How do I overcome this...

I have this severe anxiety and fear when it comes to getting pregnant. I’m on the birth control pill and take it perfectly plus don’t do anything sexual with my bf but I still overthink and am overly paranoid and wash my hands often, and don’t wanna touch my vagina anymore. When my boyfriend comes over I get so paranoid just in case he has cum on his fingers even though they are dry. This is so hard and affects my life everyday. I wanna get over this anxiety and have a normal life and don’t have to fear about this anymore. I know it’s irational but I can’t stop thinking about it...