Forgive my ignorance here... I got an iud and let my boyfriend cum in me for the first time. I was lazy and didn't pee afterwards, and didn't know the cum would come back out, so it was sitting in me for a while. Later, my vagina REEKED of fish and I had a lot of white discharge (which may have been semen). 3 days later the smell is much less pungent but still there. From what I've read here, it looks like it could be BV.