Neverending hunger but I'm losing weight

I was diagnosed with pancreatitus a year ago. In spite of a ravenous appetite I had lost 15 pounds, going from 105 to 90. I'm 5'6".
I know I'm still losing weight because I have to buy new clothes about every two months and take tucks into the clothes I can wear, but I don't want to know my weight.
I live in Mexico. I've seen several doctors and they say to take enzymes, which I do, but I still get thinner and, if I get thinner all the time, well, at some point...

I was so hungry a few days ago I ate an entire leg of lamb for lunch. I felt very very sick afterwards. I didn't throw up but my throat hurt and my belly hurt like hell.

A large gallstone showed up on a sonogram and I've been told my thyroid is "granular"

I get attacks of pain at night and they are usually different in location but not in severity.

thanks,
helle