OCD can make one worry excessively about unusual things, that’s for sure. Although I don’t have that specific concern, I get it. I have developed a serious obsession over bugs, especially bed bugs and lice. I have to check my bed every night and no longer sleep with a sheet or pillow cases, just started being able to sleep with a comforter again after like a month without it, because I worry I won’t see them. I’ve searched every square inch of my dorm to check for evidence. My point of sharing this is that I get it, in away, how ocd can make you do things and drive you mad! I feel crazy for not using a sheet and thank heavens I don’t have a roommate!
Anyway, I don’t know if you’re interested in advice for things to help your OCD or if you’re just venting, so I’ll leave it at that, but I can relate and sorry you experience this kind of stuff too :(

yeah thank you advice helps a lot

For me, what helped most was medication. It can take awhile to find the right one and you have to see a dr. and all that. ERP (Exposure Response Prevention) therapy is helpful for a lot of people (not me, but most people do get good results from this). I still have obsessions and compulsions but the compulsions especially are less noticeable now that I'm taking a medication that works. Sometimes joining a support group can help this kind of stuff, not necessarily for treatment but maybe for emotional support from those who understand. I went to a program that specialized in OCD and social anxiety and meeting and bonding with others there was really uplifting for me.
Best of luck with this. I hope you find some relief soon!