Could The Tender, Bump-like Sensations On My Vagina And Outer Buttocks With Slight Itch And Burn Be An Infection?

Hello, So since Sunday night while bathing and washing my buttocks I realised that there was this strange feeling on right of the outer part as if a bump was about to appear. By Monday morning it did feel as if there was a bump there however it did not bring about much discomfort nor pain but it tender at times. In the evening while bathing again, I felt the same feeling for the lips of my vagina and from yesterday it has gotten worse as I feel like something is wrong because as much as both areas do not feel all that uncomfortable nor do they hurt a lot, but there is some discomfort and a slight (very minimal) itch and burn. I have not personally checked to see any bumps but it feels like bumps are on my vagina and one on the outer part of my buttocks and as I said, there is this tender feeling. I do hope this is something that can be diagnosed and OTC medication can be bought for it if needs be. Just to note: I am a virgin however I have had oral sex before and the male s genitalia placed on me but that has been over a month if not more.