Intercourse always hurts..

I'm 16 so going to the doctors is hard as my parents are strict Catholics. I've gone for STD tests, checked if I had any infections, different sized penises, heaps of different lubes, and it still hurts. I've had this problem since I've lost my virginity. I've tried many positions but entry always hurts, it feels like it's tearing me and I'm popping my cherry, and I'm very turned on at the time. I'm not afraid or anything. And then it slightly burns or just casually hurts, during the rest of the intercourse. I honestly can't wait for my partner to come bc it can be just painful. There have been times where it feels pleasurable for a few minutes, AND I LOVE IT, but then it starts to hurt. Does anyone have the same issue? And have they overcome it or know what it is?