hi I am 23yrs old & about a week and a half ago I shaved my vagina area & my butt. I was rushing & used a old razor now I am pretty sure i have an infection because i cant stop itching. It itches my vagina and my butt and I am starting to get little bumps in the areas i shaved. I know it is not an std because i was just tested & havn't had intercourse since. what can i do or use to heal this?