I Am Trying To Find A Diagnosis For My Symptoms.

I am trying to find a diagnosis for my symptoms. For a few months now I have had 0 energy, feel exhausted after between 6-8 hours of sleep, my eyes hurt & burn, I break into a sweat many times a day, have a really hard time concentrating & focusing, to mention a few. The only thing different is a lower dose of levothyroxine from 150 to 125 to 112 mg. I'm pretty healthy, don't get enough exercise, I eat good food, a lot of organic. Hope you might have some guidance of what blood tests to get done. Thanks