I just got back my latest TSH results this past week, and like you, my levels were way too low. I have had fluctuations from high to low numerous times, so this is not something new for me! Do make sure you keep getting regular TSH blood checks even after your levels are within normal range. Symptoms can take awhile for patients to sometimes realize there is something not quite right, and by the time you do it can cause the distresses you mention....or the opposite symptoms if TSH levels are high.