I had Thyroid Cancer also and they removed my Thyroid... that was in 97' I went from 186 to 217 ..I started Atkins June 1st and now I'm back down to 188...
You need to Low Carb it !! Sugar/starches is why you've gained the weight and why your going diabete... Thyroid problems can be overcome very easily but you've got to listen to your body and gaining weight is it talking to you....
You just can't do/eat the same stuff as before
I'm 46 so thats another thing I've got to overcome
Stick in there!!