I started getting depo in July 2015 after having my 3rd son in April 2015. I only got the shot twice, once in July & once in November. I was suppose to get another shot in January 2016 but I never did. I have not had the shot since November 2015 and I have had regular periods for the last 7-8 months now, been practicing and keeping track of ovulation calenders making sure to have sex ESPECIALLY on those days and still nothing