need some insight plz

So about 5 days ago I had sex, it was actually my sorta second time, my first time we cut it a little short and it did hurt a little. The second time when it got in it did hurt a little but lasted like 0.2 seconds after that it did not hurt at all. I thought it would be more painful but not at all, even though I have very tight down there honestly. The day after everything was normal but after the second day I've been having some cramps and some blood coming out, and when I use the bathroom it does hurt and blood comes out. It's the kind of hurt I get from period cramps but I don't get me periods till another 2week. If this had happened to anyone? or if I should probably see a doctor, I need some help thank you.