what do I do about my ocd compulsions

Ive had really bad ocd all of my life. I used to have the compulsion of checking my exes account (yes I said I wasn’t gling to make any more posts about you but I’m not shit-talking you and this is important) and it’s came back full fucking force. my mind is actually numb. I unlocked them on TikTok and on here so that I didn’t have access to their username so I couldn’t copy and paste it but I saw their TikTok account username and now I wanna look at it realll fucking bad… but I know i cant I  know I LITERALLY CANNOT … it would be terrible .. but I feel like I must. I might message them to tell them to change their username before I go insane. Of course no one is responsible for my mental health nor my disorder but shitfuckshitfuck Ive never been good at dealing with my ocd. ex if you’re reading this change your FUCKING username please put a number in it or something. 

im not even mad cuz this is fully my disorder acting tge fuck up. What do I replace this compulsion with. I’m really scared I’m gonna impulsively end up doing it. I checked their account on here earlier in the car lile a fucking freak GOD I hate ocd what do I do.