Hello
I have gone through your question and understood your concern.
It is true,you have some major symptoms of
hypothyroidism and for this reason i suggest to do the
thyroid function tests (
TSH,T3 and T4)
At the other side you should know that the birth control pills can result in mood changes and depression.So apart the thyroid gland even this hormones can contribute to your actual
severe depression.
I can say that Estrogens in birth control pills directly affects the thyroid by thwarting its ability to produce thyroid hormones and this is the cause why during the time when you take the inactive pills you have less hypothyroid related symtoms.
This do not mean that you don't have a problem with your thyroid.As i said, you should check your thyroid function.This is very important to understand your actual thyroid situation and than to start the
thyroid hormone replacement (THRT)therapy if this will be necessary.
My advice for you is to find a way to consult a knowledgeable physician who understands the complex relationship between estrogen and thyroid hormones because you may need THRT and it is very important for you to monitor your thyroid levels and and adjust your dosage accordingly.(according to the American Thyroid Association.)
THRT is the best treatement for depression and
fatigue while suffering from hypothyroidism.
Hope i have answered to all your questions.
If you have other doubts,feel free and ask.I will be happy to help.
Regards.