I have hypothyroidism?

I am not sure where to post this but I'll try here first. I have always been heavy, then lost weight after anorxia and now am about 50 lbs lighter than my heaviest. I was diagnosed hypothyroidism after I went to dr because I was eating light and working out 5 days a week and not losing weight. How do I get my pig headed hubby to understand this disorder. He thinks I am fat and lazy and I try to tell him I am taking medication now for it and I can't help it I have a harder time losing weight. I am so depressed about this. Any ideas on how to get him to get this? I am not lazy I work out daily!!!