Depo messing me up!!!

Michelle • Baby girl born Jan. 2016
I always had regular periods, every 30 days and they've always lasted 3 or 4 days. Even when I got my first depo shot. I've only had one and my second shot was due February 7th. I didn't want my second one because I've heard of bad side effects. Now today will be my 13th day on a very light period. Is this normal coming off depo?????