Depo shot

So I got my depo shot when my daughter was six weeks the same day I had unprotected sex then that month I missed my period. Now this month I’ve been on my period for two weeks going on three, is that normal? First time I got on depo after my son I bled for three months straight because I got it right after I gave birth but I thought maybe this time because I waited it’ll be different but I still can’t stop bleeding it’s becoming annoying.