I'm pretty sure I have a disorder

Every time I have sex I think I got pregnant and I get all paranoid and think I'm having all the symptoms even when we use a condom and there is no way I can be pregnant or even when i know for a fact that I am not ovulating I think I might have gotten pregnant knowing that I really am not but still thinking that way is there anything I can take so I can stop thinking this way every time I have sex? I feel crazy and paranoid and even tho this time we used the pull out method I'm being really phyco about this