Calling all girls who have had the Depo shot..

Did you have a period? Did you spot? I got my first injection August 11th hoping it would stop my period like my GYNO said it would. Well I just realized i have a little blood in my panties. I can't for the life of me remember when I had my last period but I'm almost sure it hasn't been a month yet. Did you spot when or around your first period prior getting your first injection? Or did you still get full on periods each month? I'm hoping I'm just spotting.