no not at all your doctor should have told you this is the main side effect. i didnt have one for 10 years unless i missed my shot or had a spot here and there.
no period after using depo should i be concerned? . got my first depo shot on november 2 2011. my last shot was july 1st or 3rd 2012. and i bled that whole time i was on the shot and after i stopped getting the shot i haven't had a period since.