Please check your thyroid function test - (T4, and TSH) and confirm you have hypothyroidism
. Additional tests like anti thyroid antibodies
will help in determining the cause. Even if your TSH is slightly high you need to be on medications if you have a thyroid swelling, obese with elevated serum cholesterol
or if your antibodies are high.
You check your thyroid function again after treatment of 6 weeks thyroxine