I am on the depo shot birth control and last month I got my second shot but last month I did not have a period and after the second shot I still don’t have my period this month . Whenever I went in to get my second shot I gave a urine sample and the doctors still gave me the Second shot. I figured I wasn’t pregnant cause they can’t give you the shot when you are. But why am I not having my periods last or this month .. a lil worried