birth control depo shot & nonstop bleeding + acne

I've been on the shot for almost three months now (luckily It's almost time to switch), but I've literally been bleeding basically nonstop the A entire time. Longest I'm off my period is a day and then I start again and ruining more underwear which really isn't that cheap. Is this normal with the depo? I also was on accutane for nine months & didn't have very much acne besides a pimple or two before my period that went away in a day or two. Then I started the shot and now I have at least two pimples at a time on my face. Could this also be the depo?