First make use you use the right thermometer. When I have my course with Ray, he specify to me that’s is important to let the thermometer in your mouth for a minimum of 5 min, even with an electronic one.
Secondly, you have to wait 30 min after breakfast to take your temperature again. What your pulse rate?
Be sure that you well balance macros (prot,carbs and fat) and using salt enough.
And be patient