How can ocd convince you that you’ve done something horrible that you don’t even remember!? This has to be the definition of insane. I feel super guilty and anxious for no REAL reason, ALL of the time. This is absolute torture. It’s like my brain is constantly looking for something to worry about and be stuck on.

As you can see from the other comment, you are definitely not alone. I work with members all the time who feel this way. Our brains don't know that we have OCD - it only responds based on how we act and react. Do you avoid certain things due to these feelings of guilt? Do you engage in rituals like self-assurance or reassurance seeking that would then give your brain the idea that "hey, must be guilty of something, otherwise why would we be doing this". It will feel important and urgent to try to figure out what you've done and what you need to be guilty for. Try as hard as you can to not figure this out. Refuse to put your mental energy into the piggy bank of figuring that out. Do anything else - while resisting the urge to figure it out.