Starting to worry (may be tmi)

For almost two weeks now I haven't felt myself. I got my period seven days early. The first day it starts I had cramps so bad to the point I was crying in pain and felt like I couldn't move, Bled heavy for three days but then my period last for a total of nine days. I had a normal period last normal. And usually I NEVER get cramps that bad. But now the last four days I've been have stomach pains and lower back pains, heart burn, really bad headache and constantly feeling like I'm going to be sick after I eat.