Hi, I m 18 years old extremely athletic and in shape and have no history of medical problems until now. I started my period this past July (very late compared to the average teen) and at the beginning it was very inconsistent and light, practically non existent. Then it stopped for a few months, then came back still inconsistent and without any kind of time frame to go off of. It then stopped again for a couple of months and now it has come back and I have been bleeding excessively for the past 3 days without stopping. I am going through a box of super plus tampons and maxi pads every day (not exaggerating at all, I bleed through each time) and I ve lost so much blood that I can t even stand up without blacking out, feeling weak, and my pulse quickening to an alarming rate. I tried standing and seeing if it would go away and it stayed until I sat down. I have been drinking a ton of water and eating things that are rich in iron and nothing has helped. I have no idea what s going and I would really appreciate a medical opinion. I m getting worse by the hour and I don t know what to do.