Cant See Inside Vaginal Opening??

After doing a lot of research to find answers to my questions, I couldn't find anything and it was usually men or women not knowing what they are talking about. First, Yes I do know the difference between my urethral opening and my vaginal opening, this is the vaginal opening I'm talking about. Anyway, so when I was looking in there is just the soft tissues everywhere(same texture as it is in the very inside) but there is a tiny little hole in the middle. I have lost my virginity, I can insert tampons, and I masturbate with external objects. When I stick my finger in, it like curves and goes under the tissue that I just mentioned. Is it my hymen? (though that's unlikely) or is it bladder prolapse? (The only reason I ask that is because I saw someone mentioned it when I looked it up, I have a history of UTI's I get them about every month) I would go to a specialist or a doctor but I'm terrified and my dad doesn't have a lot of money. Am I allowed to post a picture of what I'm talking about on here? (This is so gross and TMI I'm super embarassed, but I'm freaking out) Thanks in advance! sorry for the long paragraph!!