I was diagnosed with endometriosis. I was given depo provera monthly injection (once in 28 days). I took three shots and the last injection was on June 10, 2014. I still did not get my periods. But in the past week I has spottings (4 to 5 drops of blood per day). Is this normal? When will I get back my normal periods. In fact I was given Depo Provera on a monthly basis only for three months.