Please someone give me an advice as I keep falling in the same trap

I have false memory OCD and the most recent thoughts I have are regarding harming my penis first the OCD told me to check my knives and I did then it told me to hold the knife and make sure there is no blood on it and did and I repeated these couple of times which I know was a mistake and now I have to pay for it as my OCD is trying to convince me that I have harmed my penis while holding the knife and since I can't remember the details exactly or remember how many times I held the knife my mind is going crazy and I can't find any solution to make sure I really didn't harm my penis and calm my mind down I wont do compulsions again but I just want to make sure I didn't harm myself in the past