After implanon removal?

Got the implanon inserted Feb 2011 and removed a week & a half ago because during those 5 months I've been bleeding everyday nonstop. After the removal I got a few cramps (that have gradually gotten worse) and the bleeding finally stopped 2 days after. My only concern is I have no period but I have these super bad cramps. Along with the cramps I'm having restless legs. I also have a watery discharge ever since the day I got it removed. Before I ever got on the implanon my periods were regular and I'd cramp a day prior 2 getting my period. I've been cramping for a week & a half & still no period. Took a pregnancy test just in case but came back negative. Does anyone know what may be the issue? Could it be ovarian cysts, ectopic pregnancy, an STD, or just my body trying to go back to normal? I want to go to the ER to check but really don't know what to do. Help please. Thanks!