So, I took the shot for like a year...I did not get a period for almost 9 months after I stopped taking it. I got my period back in May around the same time it would have been before I started the shot. I had unprotected sex two days after my period had ended. And now...I have not had one yet. Yes, I have taken an HPT and it came back neg. So, I am wondering if this is a side effect of the depo...or should I be slightly worried?