I started having tinnitus about 8 months ago and was diagnosed hypo in April. My last TSH, in June, was 1.92. I take 50mg l-thyroxine and feel much better but the ringing goes on and on...
Now that you mention it, my skin is still dry and my hair is still thinning. I'll ask for a free T3 next time.
Your symptoms suggest that perhaps your levels are not optimal.
What is your latest TSH and free t4?
The TSH should be around a 1, not just in the normal range.
http://www.thyroid.org/patients/brochures/Hypothyroidism%20_web_booklet.pdf
My hair falls out when my TSH goes over 2. It just went from 1.4 to 5.1 and I have tons of hair falling out.
Request a FREE t3 and FREE t4 instead of total levels. They are more accurate.