Depo Shot side effects.?

Cheyenne • Aspiring Artist&Scientist.!One day, I`m going to save the world<3

So I started taking the Depo shot in June and didnt have a period at all until the end of July. And that was all. But now I have been spotting since the 6. Thats three weeks! Did this happen to anyone else? I am definitely gonna call my doctor but I wanted some input from you girls.

So...does anyone have anything to make me feel a bit better for now.?