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It sounds like some health ocd is at play here. I’m sorry I know this is tough. However, the best tip I have for you is trust those results. As of right now you are both healthy. STDs don’t just come out of nowhere a partner would have to cheat and catch it by some else who is not healthy. There’s probably a less than 1% chance of getting it. Try to relax and live with the uncertainty. ❤️‍🩹

I was the same, I avoided unprotected sex..I was terrified to catch HPV that causes cervical cancer. I even avoided going for smears and then I feared I'd get cervical cancer if I missed them, the smear test itself didn't bother me, but fearing it would detect abnormalities or cancer did, really bad. So I eventually went and I tested negative for HPV.

If you are doing something that routinely upsets you and makes your OCD worse, then just stop doing it.