Some of my keys are automatically being pressed along with other keys

Looks like a broken keyboard. You need to connect another keyboard to your computer and check if it works OR connect this keyboard to another computer or laptop and check if it shows the same problem.

It seems like a hardware issue to me. I've had this several times in the past, and just replaced the keyboard. It could just be a piece of debris on one of the tracks. Do you have a spare around to check?