BODY TEMP WON'T GO UP

Hey everyone.
When I am NOT dieting my body temp is at around 97 degrees!
I have has my thyroid levels checked by my doctor and an endocrinologist. My thyroid is normal and I am told 97-99 is normal. However I am guessing if I was at 98.6 I WOULD GET LEANER MUCH FASTER?!
Anyway I take 25-50mcg of T3 and I feel hotter but my temp aint moving past 97! SHOULD I TAKE MORE?
thanks in advance!
(Could this temp problem be causing my slow metabolism?!)