It is the first day of my period, and when it first started last night I kept getting horrible pains in my lower stomach and gushing of blood that I could hear come out for a good 10 minutes, this happened about 3 times since it started. I have a tampon in now so I don't hear or feel the gushing, but my stomach is cramping really bad to the point where I can't stand straight up or move at all till it subsides. Should I be concerned and see my doctor or is it normal for you to loose that much blood at once and be in pain, slight head ache also which I always have during my period.