Don't know if this is TMI but I'm a bit concerned so I figured I would ask for advice or knowledge towards my situation. Every time my boyfriend ejaculates inside of me during sex, I get a very strong burning sensation inside of my vagina. The burning sensation lasts quite a long time, from 30 minutes to an hour after sex. Could it be that his cum is just too acidic or could I be allergic to it? Anyone know why this happens or how I can prevent it? (FYI, we don't use condoms because I'm on an IUD.) Any help would be appreciated, thanks girls!