Firstly, I am slightly hypothyroid and I am being treated for it. My levels are good now, been steady for a few months. I only went back on Synthroid around Dec 2009 because my thyroid was low again.
So I have also been tracking my BBT since about Dec2009. My pre O temps used to be around 97.6 - 97.9 with a coverline of about 97.7. I started my meds around then, had them adjusted every few months, and now they have been good for a while. I know hypothyroidism causes low BBT, so when I'm on Synthroid shouldn't my BBT get higher not lower???
My BBT had steadily been going down since I've been charting. My coverline last month was 97.5 with many lower temps, and now this morning my temp was 97.0!! I checked it 3 times to be sure. I don't understand it, if anything my BBT should go up, not down. My post O temps are lower now than at the beginning too, they were usually in the range of 98.3 - 98.6, and now they range from about 97.9 - 98.3.
What is going on here!?