Re: Lab results
I believe most people try to aim for a TSH of around 1.0, or at least <2.0, some even feeling well only when their TSH level hardly register on blood tests!
Unless you have a pituitary gland problem (which I highly doubt), your body is strongly asking for more thyroid hormone. With a lab range of 12 to 22, it is definitely possible that your body functions well only around 22! "In-range" doesn't mean good for you! Some people even fall outside the bell-curve and can have an optimal level above "normal" range!
I'd say listen to your symptoms first, but otherwise try to get your TSH below 2 and your T4 in the upper range I think. (Or everything in range at the very least!)