About a year ago, i had vaginal discharge and i went to the doc and he gave me medication for thrush. a couple of weeks i discovered two bumps on the lips of my vagina. they were sore but after a couple of days they went away after i put a hot towel on them. i also have this tingling sensation in my buttocks every now and again,its like there is a worm in there or something. i am soo worried, please help me. do i have herpes and i last had sex with a guy in june and before that it was sometime in november 2011. so thats what got me worried, its because people catch herpes and can live with it for the longest time without them knowing they have it. and now about a week ago i developed a bump after i shaved, it has no puss or any opening. it is soft on top and has turned black in colour and it isnt painful or anything but you can feel that it is hard inside. please help. do i have herpes,or is it a cyst or an STI? what is it?