Thanks for all the replies!
Autoimmune diseases come in three's ... that's scary!!!!
My Dr. ordered tests for hasimoto's
In addition : As with any autoimmune disease, general overall health should be taken more seriously, including what you eat, since there is a greater risk of acquiring more autoimmune health issues. If you goggle this you will find that autoimmune diseases are likely to come in threes, any good doctor knows this as well.
To elaborate just a bit, hypothyroidism is the condition of having insufficient thyroid hormones for you to feel normal. This can be due to various caused, of which Hashimoto's Thyroiditis is the most commonly occurring cause.
As imtuppence said, Hashi's is an autoimmune system problem. With Hashi's the autoimmune system produces antibodies that mistakenly see the thyroid glands as foreign to the body and attack the glands until, over an extended period, the glands are destroyed. The gradual loss of natural thyroid production causes hypothyroidism, unless the loss is offset with thyroid medication adequate to prevent hypo symptoms.
As you proceed, you will need to read and understand as much as possible about Hashi's and its treatment. The first thing is that you will need to be regularly tested for the biologically active thyroid hormones, free T3 and free T4 (not total T3 and total T4). You need this info, because TSH is totally inadequate as a diagnostic for medicating a thyroid patient.
In my opinion the best way to treat a thyroid patient is to test and adjust levels of free T3 and free T4 with medication as necessary to relieve symptoms, without being constrained by resultant TSH levels. Symptom relief should be all important, not just getting your test results somewhere within the reference ranges. I say this because the reference ranges are far too broad and every patient is different. If your doctor does not understand this, or is reluctant to treat you clinically in this manner, then you will eventually have to find a good thyroid doctor that will do so.
Hashimotos is autoimmune. With Hashimotos you have antibodies. Have they scheduled you for further testing?