You might ask the doctor for another referral. Or call the hospital you went to and ask if there's someone else in the department.
As for a supplement, I would go with Citrucel Caps. I've been on them for 2+ years and they've had me in good shape, with the exception of the last week. They are soluble fiber and they don't give me nearly as much gas as Metamucil.
I find also if I start my day with a small bowl of oatmeal (1/4 c oats + 1/4 c water) with nothing on it, I feel much better. It can get monotonous, but it always smoothes out my system better than anything else.
I also suggest eating small meals throughout the day when possible (snacks like Arrowroot crackers, Saltines etc, little apple sauce cups (unsweetened).) I thought I was hypoglycemic too. I'm not. But I thought I was and the little snacks have helped.
My doc also suggests that when you're sick and don't feel like eating to drink Ensure or one of those supplement shakes so you still get your calories.
For nausea... either ginger tea, or flat gingerale works every time for me. I'll let you know how things turn out. Keep me posted too. Karen =)