My TSH Levels Have Been In The 500's For The

My TSH levels have been in the 500's for the past 6 months. My doctor had me on generic synthroid (200 pill). He recently changed it to 300 pill. Blood work didn't really change. I was referred to another specialist who took me off of that pill and put me on Cytomel 25 pill in morning and another 25 pill at night. Do you think this Cytomel will work for me and also allow me to lose weight or is there any other medicine you would recommend? This doctor said if this pill didn't work for me then I would have to give myself 2 shots a week. He thinks my body is not absorbing the pills.