SOS!! PLEASE HELP

So I recently had sex, and when I got home to change I realized that the lips of my vagina were insanely red and pretty swollen. They don’t hurt, itch, etc. they’re honestly becoming a nuisance if anything. I’ve had rougher sex before and this has NEVER happened. The only thing I can think of would be the fact that I still had my underwear on? (A tight fishnet like material). I’m mildly freaking out and if anyone could offer any advice on how to get it to go away that would be amazing!!!!