A vaginal cyst?

Hi I need help, we’ll it’s been about a week now that I’ve had this cyst looking thing in my vagina, I think it’s on my gland walls, and idk what else to do. I had sex with my partner last week, but here’s the catch, maybe about a day or two, I was on this medication bc I had BV. Of course my horny ass couldn’t wait anymore longer to have sex, I did it, that same night I noticed I had that cyst there, it was like a size of a pea maybe, but now it looks like a blob, but idk what else to do so it can go away away, right now I currently don’t have insurance to see my gynecologist or my primary doctor. Which sucks, I’ve done sit baths but that’s pretty much it. Now with this I feel like I’m getting the itch back and it’s getting me mad. I just need some advice on what to do, I’ve never had this happen to me before. I’ve always take car of myself, and I’m only 21 right now. Any advice?