After sex w/ average size male- I have lots of PAIN & SWELLING!!!

My boyfriend of 9 months and I have sex quite often- We use a common lub, we aren't rough, we do try different positions, nothing I have't done w/ other partners- Lately I have dreded sleeping w/ him because my vaginal lips are abnormally inflamed; very swollen, very painful, it hurts SO bad I can barely walk. My 2 past boyfriends have been a bit larger and didn't hurt me a bit- and it is ONLY when I am w/ my current boyfriend. I have NO idea what this could be? Am I allergic to him? Help me- Please...

You are not allergic to him but you probably developed yeast infection. Yeast infection is not a sexually transmitted disease. Yeast overgrowth usually occurs after a prolonged antibiotic treatment but it could also be from excessive vaginal washing, douching, or even that lubrication you used or condoms. The symptoms you mentioned are most commonly symptoms of yeast but it would be best if you had it checked at the gynecologist.