I ve had normal menstrual cycles all along. I just started my period last Tues and my periods normally lasts 5-7 days. My flow is normally not heavy except for the first couple of days and I usually use a panty liner the last couple of days to prevent staining. I had a spell of a lot of blood gushing out really quickly for 5-10 min while I was driving yesterday and it soaked through my pants into my car seat. Then it slowed and didn t happen again until noon today. This time it was more severe. I had to sit on the toilet for 5-10 min and I can hear the blood coming out like urine. What s happening to me?