how long are you cycles normally? it could be implantation dip but hard to know or it could be AF coming, if you wake early like that i would take your temp then, rather than after only and hour of so of sleep as it's more acurate after 3 hours of undisturbed sleep. having said that with disturbed sleep like you had i would expect it to be higher,does that make sense? unfortunatly you'll have to be paitient for the next couple of days!!! hatd i know!!