I had something like that happen when my ex cheated on me...it wasn't that bad but it was E Coli bacteria (which means he put it in her ass then had sex with me). If you didn't have the bumps, I'd say yeast infection-which still could be. I have weird things happen before my period, too...like swelling and itching. Has it been like that for a while?
Good to hear lady. glad ya didn't catch something. reminds me of this one time i came back from summercamp and i had a bump on my girly parts..... i was so fucking scared, and i couldnt' get into the doc for like 4 days..... the worst four days of my life, for sure!! turned out to be just a pimple... hahahha silly silly me.