Extremely swollen labia 8 hours after sex

I had sex last night and noticed the sex was kind of burning and hurting me, even though my partner and I would stop every few minutes to use more lube. I woke up this morning to my labia minora and majora blown up like a balloon, like it looks like I'm growing a pair of balls. I have always had troubles with sex starting to hurt and burn after a while, along with my labia minora swelling a little afterward. We have tried switching lube, switching soaps, switching condoms, treating me for a yeast infection over and over, yet none has worked. Why could it be swollen like this???