Bumps

I have a bump the size of a pea and it is kinda white , I tried popping it but nothing came out. It's on my skin part of my vagina but the inside of the cheek part, not the pink lips, I know y'all can't see it but I'm curious if anyone has had a bump like that and found out what it was. My dr appointment is Tuesday. It kinda itches sometimes and it stings but not really. I don't have weird discharge (I don't think) and it doesn't really hurt when I pee. But it's uncomfortable to sit. Idk if it can be caused by wearing tight clothes and thongs, or if it could be caused by a different type of soap I used to shave but I want to know people's opinions on OTC medicine until Tuesday to try and get rid of it