I've been on the depo shot for a year I also haven't had a period for this entire year, and I have been having unprotected sex with my boyfriend. For the past two weeks I've been having painful cramps to the point that I couldnt even sit/stand, and today I started bleeding heavily, non stop until about 3 hours ago and a big blood clot came out, but the pains are even worse.What's happening to me ??helllp!!!