Hymen

This for the Gynos, or anyone who knows a lot about hymens. I just wanted to know if redundant hymens are common? Also, at what age does it break, or tear, if you are and will stay a virgin. I tried searching online, but there only so much info.

I started my period when I was 11.

I am 18.

I can fit a finger down there.

I have never been to a Gynecologist before.

Thank you : )