Mikey has been sick too-- some throw up, lots of coughing, teething.....the whole freaking bit.
When I called the ped she told me to skip the formula or any dairy products for 4 days. I've been giving him bits of chicken, rice, applesauce, pasta, etc. For a drink and nutrition I've been giving him Pedialyte. So far, it seems to be going ok. I've slowly started reintroducing formula, but only 2 or 3 times a day.
I'm sorry she's sick. Maybe you could try calling the ped? Would they be open?