It would be helpful if you would post your actual thyroid hormone levels, with their corresponding reference ranges, so we see your current status. Since you're taking 100 mcg levo, already and symptoms don't seem to be improving, it's very possible you might not be converting the T4 to the active T3, which is what individual cells actually use.
In addition, if you've been tested for Vitamin B-12, vitamin D and/or ferritin or iron, please post those levels, too.