K.D.
Both of my daughters, ages 2 and 4, see Dr Edwin Lui at Children's Hospital. He is a great GI dr. I can't say enough about him. He is great with the girls, who are usually very scared just because it's a dr., he always answers all of my questions and takes his time.
I'm not sure about your insurance but i'm sure you can look online and figure it out. It's usually a 4 week wait to get in but it seems to be that way at childrens with any of the drs and he's very worth the 30 minute drive!
Good luck. We dealt with the same issues for almost 2 years before getting things figured out. Life is much better now.