bleeding for the past month?????

Kinsey
I got the depo shot almost a month ago the third day of my period. I started spotting a few days after I got off my period and it had been going on for the last month now. I don't know if I should keep the shot or start the pill ? It's not a lot but it is a dark color most the time which worries me. My mom said its normal for the first couple of shots but idk...