Hypothyroid Questions...

I am experiencing what seems like classic symptoms to hypothyroidism:
depression, constipation, puffiness in face in morning, fatigue, feeling tired when
waking up, slow pulse, pms, etc... I have also been experiencing two periods in a
month for a couple months. I don't know if that is related but it is troubling.

It was suggested to me to visit a Dr. that specializes in only thyroid issues. Before
seeing him they want me get a thyroid catscan and several blood tests including:
Free T3, Free T4, TSH, Thyroid Antibodies, Thyroidglobulin

I would love some feedback regarding the tests inluding the catscan and my choices.
Since I have the symptoms, are there effective things, supplements, I can take to
considerably improve my condition or do I need to take a prescription.
I have heard about Thyroxine and Armor as prescriptions.

I would like to try and help myself and avoid what is looking to be a $650.+

Please let me know what methods have worked best for you.
What supplements have had the best results and if I should consider a prescription.
Is anyone familiar with a product called Thyodine? If so, what kind of result did you
experience?
What tests are the best or most important tests to take?
Add any additional information you feel might be helpful.

Thank you!
peace & joy,
*Butterfly