Pregnancy

I’m 17, my boyfriend and I aren’t very safe about sex, but I feel as if he’s the one for me so I’m not really stressed about getting pregnant or anything like that, I know I’m young and that sounds stupid but he treats me like a princess. We don’t use condoms and he doesn’t pull out. I was super late on my period and we had unsafe sex basically all month. I started my period and my cramps were a lot worse then usual and I’m bleeding super heavy, I usually use the regular tampons but I had to get the super plus just so I wouldn’t bleed through. Ive been starting to think about it and I’m not really sure how I’m not pregnant. Could it be possible to be bleeding while pregnant, or could it be possible that I just can’t get pregnant ??