I found an opening/tube about an inch into vagina. About 1/3' Diameter. What could it be?

Autumn • Ashes

It feels like it is supposed to be there.

I don't believe it's the cervix, but It does feels like a firm tube/tunnel like it. The problem is that I'm able to go deeper past it by quite a bit

I can fit tip of finger inside, but that causes mild pain. Is located on roof of vaginal wall about 1 to 2 inches into vagina. Tube/tunnel runs vertically, and I couldn't find anything on Google about this..

I don't have a shallow Vagina, and this thing has always been really shallow/close to my opening... It's not my urethra like some are saying because for me at least it's not located inside my vagina

I just don't know what to do/ what it is