Hi ladies i’m sorry to ask a silly question but i’m 18 and don’t want to go the to doctors unless i really need to.

I am sexually active but i have been able to feel for as long as i can remember a longish “mound” i guess you could say at the very opening of my vagina at the top immediately when inserting a finger. i have heard this could be the public or pelvic bone but i’m not sure and it is bothering me a bit. Sorry everyone.