Help std rant!!!

So a video pops up on my feed about std. I have always used protection with the exception of my long term boy friend. Well come to find out he never uses protection. Gross we are not together anymore but now I’m so scared he gave me something. I ran into him and he shares that he’s having sex with polyamorous plp without protection. He said about two girls and one set of lesbians that’s 4 people. Who is to say he was not doing that during our breaks ,cheating,or before we got together. I also find out he’s into hard drugs like cocaine, wax , idk if he used needless. Now if I have something I hope and pray is curable. I couldn’t live with myself knowing I have aids or HIV when I have been with 7 people two just one time protected. I have no criminal record a honor student I don’t do drugs snoke . I just got to law school for my whole life to be destroyed by some idiot guy I dated a year ago who lives in a granite shop where an are a was not being used and they made a room out of it.