i don't know what's going on guys... i'm on the depo shot, & i've been bleeding a majority of the…

i don't know what's going on guys...

i'm on the depo shot, & i've been bleeding a majority of the time since i got it in January. lately I've been getting these AWFUL cramps & feeling terribly nauseous/hungry at the same time even though i eat. I'm due for another shot next month. at first i thought i was pregnant, but i figured that wasn't right because i still have a flow, & as of now it's like my period. i took a test to be sure, it came out negative of course, but i still feel so weird.

i have no idea why.