Cylindrical Cervix?

[buendiabanana.livejournal.com]

I'm still relatively new in getting to know my body, and I was feeling around my vagina as I was putting my diva cup in, and felt something I've never noticed before: that my cervix isn't the end of my vagina. It's just a cylinder, with room on all sides until you get quite a bit further up. Maybe I've just never seen a good diagram, but this was a total shock to me. Is this normal? Am I mistaken in what I felt? Why, in every diagram I've ever seen, does it look like the cervix is the end of the penetrable area? Why did I never feel this when penetrating my partner?

I really hope I'm not making a total fool of myself, and thanks for any input.