I'm on depo provera, and I know that makes one's period irregular, but mine is usually very light. Sometimes, it lasts for up to a month though--but always very light, nearly nonexistent.
But last night, while in the shower, I was shaving and there was this sudden gush of blood. There was so much of it that it looked like I'd killed someone. Something like a large blood clot came out (dark red, gooey), and I bled for little over what I'm guessing is an hour and it stopped completely. Previous to this, I had been bleeding very lightly (brown-ish blood, requiring only one or two panty liners a day) for almost three weeks.
Then, this morning, I stood up to get ready for work and it gushed again--very suddenly. It soaked through the liner I wore to bed, my panties, and my shorts, running down my legs and onto the carpet (in a new apartment, no less) in only a few seconds. I ran to the bathroom, where I was confined for little over two hours this time. When it stopped, I attempted to get ready for work again and just arrive late. However, discussing the scenario and what it could be with my boyfriend, I fainted. Not just once, but two more times trying to get back to bed to lie down. I made sure to eat and get some sleep, by the way.
Furthermore, I tried using a tampon, and it leaked right through that instantly too, and the tampon wasn't "in there" very securely either (normally, I have no trouble keeping even the small light tampons in, but this time, I didn't feel tight enough to keep it in for long, and it came out far too easily--and, get this--clean except for a little of the brown blood despite that I was bleeding bright red blood. I suppose I could say that I feel "open." In the past, I've had a medical abortion, and recognize the feeling.
I am pretty prone to back pain, and have had cramps this past month. I've been thinking that it may have been a miscarriage somehow. I keep pretty current on my shots, but I'm open to any suggestions right now.
Several hours later, I haven't fainted or bled any more, but I have a headache and can't seem to stop shaking when I walk. If it helps, I was also born anemic, recently moved (and did a lot of the heavy stuff by myself), and haven't been eating well the past week or two. I'm 5'5" and weigh about 125 pounds.