I think that WJF's plan makes lots of sense. If you can get your doc to prescribe 10mg, give that one a try.
You will gain the weight back...unfortunately it takes a long, long time to heal any GI issues, and while that healing takes place losing weight is very common. Did you discuss the nausea issue with the doc who did your gallbladder surgery? (You did have gallbladder surgery, right? Sometimes I get mixed up!)
Have you seen sites like these:
I don't know if it would be of any help, but see what you think.
My stomach is getting better, but I have to be really careful what I eat. I made some bad choices yesterday, and it was worse last night and this morning. Still overall it's better.
I think your naturopathic doc has very good advice. The more you focus on your stomach, the worse it feels. I can really notice that. Hope you feel better soon!
Keep in touch!