I stopped taking levothyroxine in May after weaning off it for a year and a half. For those that are interested in what happens when you wean off levo - it takes about a month/month and a half for the body to adjust to not having the external hormones coming in. For me, one of the surprising changes was the discovery of orthostoic hypotension, which is when your blood pressure drops when you stand up. This turned out to be relatively easy to resolve, by drinking lots of liquids, increasing salt intake, wearing pressure wear, and in my case taking iron tablets to increase my iron levels.
Four month on and having gone through that initial adjustment I feel pretty much back to normal, and definitely much better than when I was on levo. I no longer have "air hunger", I don't have an abnormally increasing heart rate when doing mild exercise, and best of all - an end to anxiety and panic attacks that became part of my everyday life.
For background, I started off being severely hypo about three years ago, with a TSH of over 100 and t4 way below range after the birth of my second child. I was started off on 50, then 75 and at the height on 100mcg of levo per day. I felt like crap and I looked far and wide for alternatives to getting better. The solution for me was a drastic reduction of energy expenditure, significantly increasing rest and sleep and reducing stress as much as possible, taking in adequate iodine and selenium as well as adjusting a pretty significant iron defficiency (lost blood in two births two and a half years apart, and was at the very low end of "normal" for iron). My TPO antibodies were highest after getting off levo and at one point or another I was "above normal" for all three of the main thyroid antibody types - TPO, globulin and TSH receptor. I pay little attention to these numbers. I have regular ultrasounds and blood tests to keep an eye on things, but basically a) the thyroid heals, b) it is possible to get off levo and to feel like a human again.