does anyone here know anything about unbreakable hymens? (not sure what the actual name is for the condition).

i remember my friend telling me about this condition last year, she said that her friend had to get her hymen surgically broken to enjoy sex. apparently over 10% of women have it.

i'm beginning to wonder if i have the same thing. whenever i finger fuck myself or use a dildo, if i do it deep enough, blood comes out like it was my first time. i'm not a virgin, i've been sexually active for 4 years now, but haven't had a regular sex partner until a year ago. every time i fuck him, it kinda hurts a little bit, i assumed it was just cos i'm a very small petite person. when people finger fuck me, it really hurts, although it feels nice too at the same time.

how common is this condition? how do you know if you have it, & what can be done to fix it?