I am on the depo shot, I got it November 16. I just got my period (at least I think it's my period) about 5 days ago (today is December 17) I have had nothing but light bleeding and cramps and usually I'm heavy flow ( before I got put on the shot) and I had clumps of bloode but this is my first period on the shot and there is no heavy flow or clumps and its lasting longer than usual.. I'm worried. Is this normal?