Can you drink gatorade? Can you have dairy? I know to stay away from the obvious...spicy foods, pasta sauces, garlic, fried foods, soda :( , but what can you eat?

I haven't been diagnosed yet, so I'm paying attention to what I eat and the symptoms. I had a small portion of mashed potatoes and gravy today (a coworker brought it in). The gravy had a bit of a zing to it and my throat has been burning ever since. I only took a couple of bites and I couldn't eat anymore.