I've been itching since Monday!!

I had sex with my boyfriend on Saturday. Every time I have sex with him I have sort of a fishy smell that lasts about a week and goes away. I'm not sure what's going on this time, I'm having the same smell but I'm also itching along with it near the hole area.  It also burns when I use unscented soap down there which is weird because it never used to burn me. I've also been recently treated for a yeast infection and ureaplasma so I don't think it came back so soon. What do you think it is and what should I do? Maybe he was too rough on me? It's stressing me out 😔