COVID-19 anxiety's impact to my output: any strategies for mitigation?
I expect research output overall to be down this year into next. Surely some people will cope better than others, and different types of research are more or less directly impacted (e.g., that requiring solo work at a computer, versus that requiring access to shared facilities that may be/have been closed, versus that requiring face-to-face contact with human subjects). Others will have additional direct challenges to their time: childcare may be closed and children may be learning from home rather than school, for example.
@paulgarrett's comment is exactly what I was thinking of as an answer:
A small point: forgive yourself (as opposed to judging...) in this situation. It is crazy. To accidentally pretend that things are not crazy will obvs make you more crazy. My advice would be "cope with the bad current state, and wait to think about things later..."
...except I think this is the main point rather than a small one.
Besides that, it sounds like you're trying all the right things (eh, maybe not the booze, but if it does help you relax and if it's in moderation and not purely as medication then there's little harm).
I think the most "solvable" problem you have (or, at least, one I can provide some advice on) is this part:
Compounding all this, I accepted several large projects in January which are now past due. (...) Writing, especially, is very difficult, which puts me further behind, which leads to more anxiety.
You're probably best off doing some prioritization (from @avid's comment: "What actually needs to be done by when? Can projects be reorganised to be more achievable? Can deadlines/deliverables be re-negotiated? Try and focus on completing one task/project at a time") and scheduling. There is no way you can make up for weeks of reduced productivity in an instant. Instead of worrying about everything you need to do (a circumstance I find myself in often; not new to COVID for me), set an immediate-term schedule for yourself.
The granularity might be something you experiment with, but try to set specific, achieveable goals for the next week, the next day, or the next hour. Do your best to meet them, but don't beat yourself up if you don't. Reevaluate your progress the next time you set goals. Try to focus on what you've accomplished.
It may be helpful to tier your short-term goals into:
Things you will accomplish (today/this week) no matter what (except emergency, of course)
Things you reasonably expect to accomplish
Goals to aim for in an ideal world
Probably the things you slot into "3" might look like a normal week for you pre-pandemic, or even far less than normal, and that's fine. Focus on making bits of progress on your projects that you can feel good about. Be prepared to have days and weeks where you only accomplish the tasks under (1), then forgive yourself for not doing more, remind yourself you've at least achieved your personal minimum, and move on.
In closing, though, and echoing Paul: forgive yourself, you're under a lot of very understandable stress in a crazy time.
I have suffered from anxiety for some time now, so I will talk from personal experience!
First of all, I can't stress this enough: it is 100% normal for you to feel anxious in this time. It is very important for you to aknowledge that for you to be able to deal with that; even if you think you have aknowledged that, it may be the case that your subcouscious is still feeling 'guilty' about it and making you 'anxious because you are anxious', and it is ESSENTIAL to break this cycle!
What has always worked for me in times of greater pressure was concieving achievable goals: sometimes, you can have the tendency to set an extremely exigent goal, and then you'll be anxious when you don't meet it, and it's important not to do this.
When you can't set a smaller goal (either by responsability or deadlines or something like that), it is VERY helpful to divide your goal into small, more achievable steps! When you have a very big goal, you have the tendency to think you still haven't acomplished anything, when in reality you have acomplished a lot; if you divide your goal into smaller steps, you will actively see them getting achieved and checked off your list, and you will see that you are actually being very productive.
Another very important thing is to know that, if you don't achieve one or more of your goals, the world isn't going to end. Maybe you had a conference coming and you had a breakdown in the midst of all your responsabilities, and you couldn't prepare for the conference: your anxiety will tell you it is the end of the world, that you have failed and that you evaluation will be negative, and whatever else you are afraid of. But this is NOT true! Everyone, anxious or not, fails many of their goals frequently; it is only human to do so! So if you do fail, just tell yourself: "this is normal, this is okay, this is not the end of the world; I have tried my best and, therefore, this is the best possible outcome, so I should not feel guilty about it." Even if 'your best' was giving up on it, it WAS your best because you had so much on your plate, so it is normal to have to leave something behind!
Something that also helps a lot, that is obvious but not many people pursue when feeling overwhelmed by work, is to allocate some time per day or week in your schedule to a hobby you enjoy: this will not only allow you to relax and reduce anxiety by making you think of something else, but it will also help you revitalize and have more energy: anxiety, unfortunately, is very very energy consuming, making it a vicious cycle: you have too much to do so you are anxious, but it consumes your energy so you acomplish less than what you would if you were more relaxed. Therefore, replenishing your energy is absolutely essential, and a very good way of doing that is obligating yourself to do something you like (actually block a time slot for that on your schedule, it really helps).
I would also suggest seeing a doctor, because you may want to look into something to help you sleep (there are a lot of natural pills that help you relax and that do not cause any dependency at all, such as valerian extract); altough it is a temporary solution, it may help you a very great amount in this time of your life.
I really am rooting for you in this time of uncertainty. Best of luck with everything!
EDIT:
Also, if you are into exercise, it helps you release endorphins and will physically make you more relaxed! If you're not into typical forms of exercise (like gym, running, etc), you can try other activities that also make your heart rate faster, such as dancing, walking fast, playing with a cat or dog, etc etc!