Suggest Remedy For Soreness And Swelling In Vagina

i have a severely sore vagina, one of the lips is very swollen, i have had problems with dryness lately as I have been on an anti depressant, and i would often get little cuts etc but the last week its been intolerable pain. It almost looks like someones gone in and cut the lips! I havent had sex in several days and yet I have a whole lot of cuts and it really stings and burns. But i have had an std test rather recently so i dont see how it could be that! what could it be? ouch!