Hi, I Have A Full Thyroidectomy Done Almost Two Years

Hi, I have a full thyroidectomy done almost two years ago. It was papillary cancer. I now have to take 125mg synthroid every day. I am 57 years old, 5'5" and now weight 165lbs. I have put on 15 lbs! I work only 4 days a week because I'm too tired to work 5 days, I'm off on Wednesday which is a big rescue for me. So, my questions is can I still take this supplement?