Hi, I been on the depo shot for a year and a half. My last shot of depo was in April of 2008. I have not got my period yet although the I have been spoting now and then. I also just started taking vitex about 16 days ago and have been spotting more. I want to become pregnant but is having know luck. Myboyfriend and I have sex a lot but noting is happening. Do anyone have any answers?