I was on and off depo for about 5 years. I spotted constantly and rather heavily, lost libido, gained weight, etc.
My last shot was 13 months ago, and I was on nuva ring for a few months after, but haven't had any BC since november.
From november to februaryish I had a full 6 day period every other week, and since I've been spotting mid"cycle." I quote cycle, because I've charted the last two and haven't actually ovulated.
This depo is nasty stuff. I'm rather upset that I let myself be put on it, and then stayed on it for so long because it was "convenient" despite the near constant bleeding. It's insane how much pressure I got at the OB every year until I finally took the prescript.
Mama to twin boys, Oct-'09 and baby girl, Apri-'12!