A couple of months ago I was told my thyroid medication was no longer available and that I must change. Through this process, from human error, they miscalculated the conversion, thus increasing my dose some 45%. I felt this increase substantially after 4 weeks and was hyperthyroid. They changed the brand again and cut my dose substantially, so that 4 weeks later I was hypo. I ve been on a dose now that was comparable to what I took before all this. It s been three weeks and I continue to feel incredible weakness and tingling in my arms and legs. I literally can t stand more than 10 minutes, can t even fold a basket of laundry without a break. This is in stark contrast to my previous self before all this, where I worked out 5 days a week. Is this due to my thyroid? Or should we consider something else? My TSH last week was still somewhat low but technically within normal range,