YHi Im A 19 Yearold Teenager Who Just Recently Started

YHi im a 19 yearold teenager who just recently started having sex. On my first time, it hurts a lot and there are bleeding on my sheets. And then the night after that, my partner and i decided to do it again and it went smoothly and pleasurable somehow but it still hurts. 2 weeks after that, we planned to have sex again and suddenly our bed went bloody not too much but enough for me to get alarmed. And my vagina feels uncomfortable and there was a hot sensation. I feel like the bleeding was caused by the opening because my partner haven't fully got his penis inside me. Im not sure if it's just normal or what but im afraid to see a doctor and so i went here asking. I checked how my vagina looks like and i got much more alarmed when i saw fleshy teethlike tissue surrounding and actually blocking my vaginal opening. I did researches and i cant find an accurate answer. Please help me.