What happens if i get the depo-provera shot before my period?

Could change : Your period timing could change as the effects of Progesterone can cause a disruption in your normal cycle. For some women their periods get really light and sometimes even go away completely on the depot Provera (medroxyprogesterone) shot. Some women have more breakthrough bleeding (bleeding when it's not time for your period). But overall, you'll be fine if you get it before your period.