For the past 3 - 4 days I've been measuring my BBT first thing in the morning... BUT my digital BBT is reading my temp really low 34.4 -34.6, and on the charts that I got with the BBT & in books, this temp isn't even listed, 35.00 is the lowest they go to! What's wrong with me!?! Any advise from BBT users would be much appreciated!