Where is AF?

Hi ladies. I am now on calendar day 44, nine days late for AF, so confused what’s going on. My cycle is always right on schedule and I’m getting negative pregnancy test. I would assume by now I should be testing positive if I actually was pregnant so I’m super frustrated that my period hasn’t started. I’ve had horrible heartburn for about two weeks, some mild nausea and food adversions and mild cramping. Should I just count myself out of this cycle and hope my period starts soon? I would genuinely love any feedback or comments or advice especially if you have had a similar experience. Thank you ladies!