I have been on the depo shot for about 2 1/2 years now and prire to that I was on the pill. From my first needle it took 9 months before I saw a period again but that was it no more blood not even spotting until now. I have just started a stricked new died and excersise it's day 5 and I noticed spotting when I went to the toilet, I'm assuming that my lifestyle change is what has caused it but I would like someone to have a second opinion