no thyroid & weight loss

Anyone have no thyroid and losing or lost weight? If yes, how?

I gained over 60 pounds because of Hurthle Cell Carcinoma. I've always worked out, but I haven't been able to lose a pound since I gained all the weight because of the cancer. Don't get me wrong, I don't always eat healthy. However, for how much I work out and monitor what I eat, I can't lose.

I'm on levothyroxine, fully dependent on it with no thyroid. I'm also trying to conceive. Suggestions?