about the last 6 months, right before I start my period, about 3 days before, my vagina gets very itchy, and then after trying to itch, it hurts to pee. its like a burning, but its not my bladder , it only hurts if I scratch , and sometimes my vaginal entence will hurt when I wipe. what is wrong? I have only had sex once in the last 14months, and it is happening more since I had sex.