TMI sex/fish smell

(TMI) Should I smell like fish every single time after I have sex with my partner?

I’ve never had this problem before, and he used to be able to finish in me all the time with no odor afterwards. Now that I got my IUD taken out, every time we have sex (even if he doesn’t finish in me) I have a fishy smell down there. I’ve even gotten treated for BV and am always fine until the sex happens.. what is the problem? Anyone else have this issue?