bbt drop 17 dpo no period w pregnancy sypmtoms anything wrong

my cycly range from 28 to 32 days. I am now 18 dpo bbt stay between 98.1 - 98.5 for 16 days then drop to 97.7 17dpo and 97.5 18 dpo what could be the problem i have no period yet and with abdomonial discomfort n feeling nauseated no vomit, breast engorgement

[Quinns momma]

Sounds like your period is on the way. Esp with that big of a temp drop over the last 2 days.

[tyu]

yes, you are right. my period was on the way with the temp drop unfortunately. Guess what ? The OB dr told me that there was no ovulation from my blood work, how could that be possible?