Progesterone can work either way, either make AF come early or stop it coming.
Sorry to hear about the HPT result, did you do it on your test day or early? If you tested early there's no guarantee that its right. Many people on here have tested a day early got a -ive result then gone on to test +ive on their test date.
HTH
Susie
Me 37, DH 53 Male & female factor
1st ICSI +ve, a daughter born 2001
2nd ICSI +ve, a son born 2006