It might be too early in disease process to be diagnosed by usual practice, but a good thyroid doctor pays attention first to symptoms, and then Free T4, Free T3 levels. You can get some useful information from reading at least the first two pages of this link.
http://www.thyroiduk.org.uk/tuk/TUK_PDFs/diagnosis_and_treatment_of_hypothyroidism_issue_1.pdf
I appreciate the reply and encouragement. Also, the med. and lab info you supplied. I'm hoping this endo is who I'm looking for. I requested a doctor who treated HT despite euthyroid levels. In her practice description she focuses mainly on thyroid and thyroid issues related To pregnancy. I'm anxious to make it through a day without a required nap and be able to continue my race training schedule! Much gratitude to you!
Have you been diagnosed with lupus (SLE) or another connective tissue disease?
Your doctor was wrong to shrug off your results. You should make sure they always test you for both of the biologically active thyroid hormones, Free T4 and Free T3. TSH is a pituitary hormone that is affected by so many things that at best it is only an indicator to be considered along with more important indicators such as symptoms and also levels of Free T4 and Free T3.
With your symptoms and your positive tests for TPO ab and TG ab, that is indicative of Hashi's, regardless of the TSH. It may be that you are in the early stages of Hashi's, thus your TSH is relatively still low; however, with your symptoms, I expect that when tested you will find your Free T4 and Free T3 to be in the lower half of their ranges, and that you need start on thyroid med to raise your Free T4 to at least mid-range, and your Free T3 high enough in the upper half of its range to relieve symptoms.
I would not over anticipate that all will be well from seeing the Endo. Frequently they specialize in diabetes, not thyroid. Also, frequently they have the "Immaculate TSH Belief and only pay attention to TSH, which doesn't work. If they test beyond TSH then it is only for Free T4 and if in range, they use "Reference range endocrinology" and say that your results are normal and symptoms are not due to thyroid. That also may be very wrong.
A good thyroid doctor will treat a hypo patient clinically by testing and adjusting Free T4 and Free T3 as needed to relieve symptoms, without being constrained by TSH levels. Symptom relief should be all important, not just test results.
When you see the Endo, I suggest that you ask to at least be tested for Free T4, Free T3, Reverse T3, TSH, cortisol, Vitamin D, B12 and ferritin. I also suggest that you ask the Endo if he is going to be willing to treat clinically as described. Also ask if he is willing to prescribe T3 type meds like Armour Thyroid and Cytomel. If either answer is no, then you will need to find a good thyroid doctor elsewhere.
When you have further test results, please post them here, along with reference ranges shown on the lab report and we will be glad to help interpret and advise further.