Month long period after baby

I started my birth control after my 6 week appointment (I had not received my period yet at this point.) I bled through the week of placebo pills, my entire next pack of pills and now I'm back on the week placebo pills. Hoping starting up my next pack will end it finally but I can't even figure out how my body has this much to bleed. 🙄 

Has anyone else had a ridiculously long first period like this?