Cycle after baby

What was you cycle like after it returns post delivery? I got my period feb 28 and it was 9 days long with 4.5 of those days being super heavy. It will be 6 weeks this Friday and I haven't gotten my period yet. Test time? Just being wonky before regulating? I've always been like clock works. Baby is 6 months old April 8...hubby will be pissed if I'm preggo. And physically, I'm not ready. I'm pretty sure I have adrenal fatigue and wondering if that has something to do with it being late.