AF was regular now MIA

Since I've had Matthew my AF has been regular every 29-30 days. Well today is day 33 and I have no sign of AF...no spotting, no cramps...nothing. I took a preg test on Friday (31 days) and it was negative.  Anyone have this happen? Wondering if this is normal should I call my ob? Take another test? Or what??

id wait a few more days...retest.. then go from there..

I think it is pretty common to have whacky periods after birth. I don't think I would be too worried. Test again in a few days ( you could have irish twins...lol) Shari