N.S.
This happened to my daughter last year. Went on forever. We really had to stick to the brat diet (bananas, rice, applesauce, toast). Although, the bananas made her vomit at first, so we ruled those out. We also included chicken soup broth. I made it cool enough to stick in a sippy cup or bottle, whatever you're using. Have you tried different flavors of pedialyte? Now that my daughter is older, she can tell me what she likes, and it really varies from day to day when she's sick. Sometimes all she wants is grape, next time she hates grape and wants flavorless. It's tough, but I'd keep trying.
Skip the formula for now, that definetly upsets the stomach. If you don't feel comfortable skipping the formula, you could try switching to soy formula. I used to do this when my kids had a bad cold. Milk based products can increase the phlem production, making them more nausous. The soy doesn't seem to do that (also didnt' stuff their noses up as much)
Hang in there. I thought it was absolutely crazy when it happened to us last year. She was older though (2.5). Thought we'd never get her to normal eating. the doctor told us that sometimes it's not that they're sick any longer, it's that their stomaches need to adjust to their normal diet again. Similar to what people with eating disorders would go through. They just need to adjust to having food in the belly again, and the body needs to adapt to digesting it again.
Best of luck