Welcome to the forum, @jnstefan! She should start feeling better within a week or two if she is truly avoiding gluten and if she isn't also showing intolerance to other foods. It is quite common for celiacs to be dairy intolerant (not just the lactose but the protein casein in dairy) and to oats (protein is avenin). Casein and avenin have structures similar to gluten. We call this cross reactivity (not to be confused with cross contamination). So, you might look at pulling these two food items from her diet to see if there is improvement. But achieving a gluten free state is more challenging than people realize when the first start in. It is hidden in so many foods you would never expect to find it in like soy sauce and canned tomato soup, just to site two examples. This might help:  

My 10 year old daughter was diagnosed with Celiac 2 weeks ago. We've been on gluten free diet now for 2 weeks. She still experiences abdominal pain at times , and is struggling with fatigue. What is everyone's experience with how long it takes for the body to heal and stabilize after starting the gluten free diet? Thanks for any feedback!

thank you for the insight  Thank a small elevation can be due to this or is it more likely to be cross contamination ? 

HEY HB333!! Did you ever find out what you had???  I’ve been having those same things for 10 months almost a year now!! but I’ve also been in extreme agonizing hell!!  With those bumps, I’ve become itchy everywhere to the point we’re not be able to do anything but itch and cry for hours!! they have gotten so bad they’re all over my body head to toe. I have stuff coming off my scalp and stuff coming out of my ears and all my nails are brittle and breaking and I’ve got stuff under my nails and it’s even in my nose and my eyebrows, and I don’t know what to do!!!   But I’m having those little bumps just like you and white stuff around them and then my hair follicles have white stuff on them and my skin is breaking open and leaking white stuff and my dermatologist in the ER won’t help and I don’t know what to do!!! nobody knows what it is!! I really need help!! did you ever figure out what it was??? 

It could be. Think I'll just have to avoid that cereal. Thank for suggestion..