Welcome to HCM,
You are having Hypothyroidism
and rightly treated with Thyroxine
supplementation 50 microgram/day ( Please note dose is in microgram and not in Mg?)
if proper supplementations are not taken then deficiency can develop Vit D was low it will come to normal please continue to take vitamin D as advised by your doctor, Other parameters like Hemoglobin
should also be taken care.Adequate amount of calcium supply should be ensured if you are feeding.
Take care of diet with proper calories, proteins for thyroid any special diet is not required and regular exercise will help you take care of sunlight exposure take advice from your doctor.
Please discuss with your doctor in investigate so as we do not miss anything.
If there are any signs of depression
then proper mood elevators may also be required.
Hope this helps
Dr.Akhilesh Dubey M.D.