AF after a miscarriage

I had a miscarriage in August of this year, it took about six weeks, for AF to come on. I finally got my period in September and now glow says AF should have started yesterday. I took a pregnacy test a week to early and a day before my period was supposed to start I got two BFN. AF still isn't here yet, is my cycle just throwed off still from my miscarriage? Or could I possibly be pregnant?