double uterus? septum? please explain

Okay, so i have been having sex for about three years. my last boyfriend of 2 years never used a condom with me, and i never got pregnant. (*he dates a girl for 4 months after me, and gets her pregnant?) my now boyfriend doesnt use a condom either, but im on birthcontrol. in the past i have had a hookup where he didnt use a condom and i still didnt get pregnant. ive always thought that i couldnt, and friends of mine agree. my mom also has a very hard time getting pregnant and i remember growing up her having many miscarrages.

well when my boyfriend now puts his fingers inside of me, he tells me that there is a wall in the middle and its like there are two passage ways, a left and a right. when i put my fingers inside of me to check, i felt the same thing. he said he watched a thing on tv about a woman having two vaginas but i looked up pictures on google and mine looks normal. its just the inside i was worried about.

and this may be the reason why i havent gotten pregnant, even though i havent been careful. i dont know if i have a double uterus or something, im very confused. im kindof thinking that it is passed genetically and my mom just hasnt told me of my deformation. somebody should let me know what this is, please!