This is slightly off topic, but Jenn mentioned the thing about the sugar in cough drops... I was able to find them w/out sugar the last time I was sick back in March. They just used aspartame for sweetener and didn't taste all that different.
Dreaming, I can't think of what else you could have done either. My mom, the nurse, always recommended the same stuff every time for nausea/settling the tummy/balancing electrolytes...gatorade, Sprite, saltines, mashed potatoes. The only other things that occur to me are maybe some soups you could try (I think there are some OP soups in the new cookbook) or maybe some unsweetened applesauce or sugar free jello? Sounds like hospital food.
Glad you're feeling better today.