what is going on?

Monica • 33, preggers with #1

strong positives on opk, good BD timing, thought this month is perfect then temps are continuing to fall rather than rise.. what the heck is going on?? advice or support? we just started using the air conditioning in the bedroom at night and Im a naturally cold person (if the air is on I'm usually in long sleeves until I go out, winter I'll sleep in a hoodie.. could this just be happening because of the change in room temp effecting my body? (like how after a shower my temp is naturally higher) I'm afraid this means for everything else being perfect I'm already out this month :(