How did those thyroid test results come back if you don't mind me asking? I posted some info last time based on what your test results read and what the average is. Not sure if that helped any.
The best time to take you bodytemperature in 3-4 hours after you wake up. It can very from day to day but I was just concerned since you mentioned having T3 tests done last time.
Make sure you're getting enough sleep, not overtraining, getting enough calories, zinc, vitamin b6, sodium.....Please have your tests results checked by your doctor if you haven't done so already.