I am 16 and I am gay. I have been licked out and been fingered by my girlfriend a few times over the last month and recently shaved and realised that was stupid when my vagina became very itchy. I let the hair grow back and the itching slowly stopped I thought I was okay again until over the past few days the itching has started again on my vagina lips. It's really painful, I doubt I have an sti because my girlfriend has only been with one girl before but it is possible. what should I do?