Thank you for posting your query.
I have gone through your symptoms. Since all your reports are normal, there is no need to worry.
Following are the possible explanations for your symptoms-
1. Effect of medicines- sometimes, doctors prescribe corticosteroids
after a pituitary surgery. Steroids can produce most of the symptoms that you have.
2. Excess drinking of water- If you drink more water, there would be more urination, fatigue
, etc. This becomes a vicious cycle. So, you could try limiting your water intake (despite feeling thirsty).
I hope it helps.
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)
Apollo Hospitals, Hyderabad