I think this is very understandable. No, I don't have similiar experience, but I can still understand you. It is a very intimate thing and requires a lot of trust and also self-confidence, which both you lost with those experiences you had to make, which I feel very sorry for you.

I don't know if it is a good idea, but theoretically the one thing you could try is "exposition", meaning to go and have sex, make a hopefully good experience and re-learn that it is generally a good thing. Maybe you have a good old friend, maybe an ex-lover ... I'm thinking like falling off the bicylcle and getting back on immediately.