bleeding after sex 😭😭😭😭😭 TMI

This morning my boyfriend and I had sex (obvs) and he wanted to try it with my leg on his shoulder which only lasted 5 seconds or more before we went back to our original position. But after that I've been getting painful cramps and every time I wipe there's blood on the tissue but not in the toilet and it's only gotten a bit heavier since the cramps started. I know he most likely hit my cervix but I'm just wondering will the blood stop soon or am I going to be on my period? Even though I'm on the pill and skip the periods so I don't have one. 😩