Well my temp dropped below my coverline this morning, so I'm just waiting for AF to show today. I didn't get much sleep last night. DS was not feeling well and woke up several times. I know that interrupted sleep can affect your BBT, but does it usually make it higher or lower? Logically, it seems that your temp would be higher if you were more active during the night. But several of the lower temps I've had during my LP have been on nights that I didn't get as much sleep as normal.