It’s painful ...

So a few days ago I was wearing bike pants with no underwear under neath (only because we had come back from the beach and I wanted to air it out on the ride back home). I accidentally fell asleep and when I woke up my vagina was burning, red and itchy. I didn’t think much of it as I would usually get fabric burn and just wash it out again but I guess I got abit stupid and horny and had sex the day after. We used latex condoms and also he fingered me quite roughly prior to sex. It’s been a couple days now and every time I pee it burns, it’s itchy and red. Anyone know what tf is happening?