I got my first depo shot November 10th 2015. I got the shot on day 4 or 5 of my period and it ended normally. It is now December 27th and I have been bleeding for 15 or 16 days. I was told I would spot for two weeks but this is a little heavier than spotting and it has gotten lighter in the past few days. When will the bleeding stop? Should I go back to my Dr? Is this normal?