My SO and I had unprotected sex about 4 weeks ago right after I finished my last period, I started bleeding lightly yesterday (my period was due tomorrow anyway so I thought it could just be my period starting early) but I had unbearable cramps today to the point where I couldn't walk and I just dropped to the floor and layed there until the cramps calmed down, but it happened many times where I couldn't handle and I just cried and stayed in one place until it went away. Not long ago I was sleeping and woke up from a very sharp intense pain in my lower tummy followed by a gush of blood so I slowly got up and went to the bathroom and saw I had a few blood clots and a whole lot of blood.. I'm used to getting really bad cramps on my period but not to this extent. It's very late at night where I am atm so I can't see my gp and despite what my SO says, I don't think cramps is a good enough reason to go to the hospital. I'm asking if anyone may know what it could be or may have any advice on this please. I'm 21 years old and I've never experienced anything like this.