help!!!

okay help i’m panicking. my boyfriend and i recently became sexually active and have done it three times now. the first time was painful but not as awful as i thought it’d be, and i bled a little for about two days. the second time we had to stop because it hurt too much, and last night i was in ridiculous amounts of sharp, stabbing pain. i kept going and decided just to power through it because i thought it’d have to be worse before it got better. i ended up not being able to take it any more so i got up and i just started dripping blood. i bled a lot for the rest of the night and am still bleeding very slightly (little amount of blood in discharge) today. last night it looked like just pure blood when the first time it was like blood mixed with discharge? please help i’m really worried.