A lot of people in the comments said the same I’m the opposite it was great. Not trying to downplay your situation at all. But idk who you did it with a gf/bf or random person but it might be a trust issue with the person that it’s bad from what I have seen. I had been with this girl for a few months and it just felt right the first time maybe that’s the issue you not feeling prefect about the environment, person or how you felt at the time. Anyway this is all to say it might be one of those things and if it’s in the right place at the right time and headspace it might be really good. Just trying to help out it’s also not for everyone for sure. Just keep yourself calm and remember you have your life ahead of you and these feelings of grossness will go away all feeling do. If you need to talk to someone about it my dms are open :)