Confused and worried

Ok so here's the breakdown

Fertile time: Dec 4-11 ovulation on the 9

Lmp: Nov 22-27 (all was normal)

Baby making numerous times during fertile time

Expected AF on Dec 23 and nothing came

Last time we had love time was the 24

Took a hpt on Dec 29...negative

Took one this morning negative still no AF yet. Feeling tired and occasionally nauseous and moody. Lose of appetite. Temp keeps fluctuating throughout day.

Any ideas?