What Causes Fatigue, Dizziness And Shortness Of Breath?
Check adrenal function:
Hello and thank you for asking!
I have gone carefully through your concern!
The symptoms you described are hardly caused by an under active thyroid that is being treated with 150 mcg levothyroxine ( the dose is relatively high) but anyway is TSH level is too high, it may explain them.
I would suggest to check adrenal function to rule out an adrenal insufficiency as your symptoms are typically suggestive for it.
Except of thyroid hormones, Cortisol hormone produced by the adrenal glands is responsible to maintain normal blood pressure, energy and mood disorders.
So, you may discuss with your treating physician about checking it if it is not done until now.
Hope i have been helpful.