Welcome to Health care magic,
After going through your history,You are diagnosed case of Hypothyroidism
,and taking regularly Eltroxin.
You only require dose titration of Eltroxin initially your TSH was high hence higher dose was given once it is in normal range we need to adjust the dose of Thyroxin.
It is important to check other parameter like FBS,PPBS, Lipid profile
Kidney function,and Thyroid Ultra sonography
. If you doctor feels anti TPO and anti thyroglobulin
antibodies and FNAC of Thyroid .
Please consult good Physician /Endocrinologist
and we can increase dose in small amount like 125 mcg per day, There are many strength of Thyroxine are available to titrate the dose and then repeat TSH after 1 month to see and once dose is determined Thyroid function may be done twice a year.
Your weight increase may not be all due to hypothyroid please take care of your diet and exercise to keep near desirable weight.
Please take care
Best of Luck