Period ?

So I had my son September 1 2016 and I bled for 6 weeks then it stopped for a week then I bled constant after that . then I got the depo and bled for another week then it stopped for about 3 months but now that I need to get the shot again I've been bleeding for about 10 days now. is that normal? is my body out of wack or something cause I'm tired of bleeding all the time .