i'm on the depo shot and have been on it for 9 months now, meaning i've gotten the shot 3 times. through the 9 months, i haven't spotted or anything, now i'm getting horrible cramps and am bleeding heavier than just a "spot"...i've had sex recently...i don't know what could possibly be wrong. people say "it's normal" to bleed on the shot, but if this is the FIRST time i'm bleeding...it's not normal.