I had a bit of wear and tear in my vagina due to rough sex- it stung a little but otherwise fine. After I had sex again a couple of days later, the vaginal wall became swollen and itchy and it burned when I peed. Coincidentally I also started on my period in this time, so I thought it could be due to that. But today, my period is almost over and the burning sensation is spread to my urethra as well. Peeing seems like a punishment. What could this be? p.s. sex was unprotected both times and we dont have STDs.