This is Dr. David
have you had routine thyroid blood testing recently?
what has your TSH and T3 and T4 levels been?
you are on 350mcg of thyroxin a day?
Yes to both .all fine with blood test
do you know the TSH actual level you had?
at age 56, have you had your menopause?
have you tried to cut calories you are eating and exercising?