Swollen after sex

Madisson
So I'm truly concerned. My boyfriend of 2 years and I are pretty active sexually. In the past several months everytime we have sex,condom or not, my labia swells up,sometimes painfully. At one point (and this is going to sound gross) it felt like my vag turned itself inside out. We use water based lubricant. I'm not sure what's going on! Any ideas?