Re: Feel like a major basket case
I have fibromyalgia, and have had panic/anxiety attacks when my thyroid levels are very low (happened recently when I was taken very suddenly off my thryoid hormone for several weeks). Now, I don't know if this is the case with you, but I have heard of people who suffer severe hypothyroid symptoms when being put on TOO LOW levels of thyroid hormone. The reason this happens is because the thyroid stops or slows production of T4 based on signals from the TSH. Too low an amount of exogenous hormone that you are taking is enough to lower the TSH, but not enough to compensate for what the thyroid was producing endogenously. So, you end up MORE hypo (that is, with less T4) than you had before you started taking any hormone.
I thought of this in your case because that dose of levolsy you are on is really low, and you've been on it long enough that it can affect your TSH and thyroid production of its own T4. I suspect this is what happens to a lot of people who initially feel good when they start low doses of T4 (because it is added to what they already have), but then they start to feel awful after a few weeks, when their thyroid gland slows or stops production altogether.
Just a thought.