Need a peace of mind .

I’ve noticed I’ve been really panicking a lot for about a month or or 2 about getting pregnant it’s gotten bad idk why I overthink and worry too much and I hate it .. I get paranoid to pee on the toilet because guys are dirty in my house and get pee on the seat who knows what else they do ...also when im with my bf on his bed laying down even using his bathroom .. because there could be sperm and that would be the stupidest way to get pregnant especially not being active atm .. my bf jacks off a lot on his bed it sound disgusting but I’ve been scared a lot thinking what If it gets in me what if I sit on it and don’t notice what if I pee and some gets on me ... also when I sit and pee I notice sometimes my underwear touches the bottom of the seat I get mad . It bugs me and I always stress people are gonna judged but it’s possible it’s semen.