Thank you all for taking the time to respond. It's comforting to know I have a place to ask questions and share my concerns.
My daughter's antibodies are as follows:
1/9/17: 783.6 (before stopping gluten)
Her thyroid/hormones all in normal range. An endoscopy in May showed her villi looked good with minimal damage. Her B12 (checked on 8/14/17) is excellent. Her antibodies will be checked again when she returns home in Dec. She avoids gluten as much as possible, however she's away at college so cross contamination is likely. She eats extremely well -- mostly salads, vegetables, protein, fruits, rice. When on the go she supplements with kind bars, quest bars, or Rx bars. She'll snack on gluten-free crackers (Blue Diamond made from almonds), hummus, peanut butter, and popcorn. Once in awhile she'll treat herself to Tate's gluten-free cookies or Halo ice cream. She's in college so, yes, she drinks alcohol on occasion. Titos gluten-free vodka, but no beer! Since stopping gluten her stomach feels much better, less bloating and pain (her main complaints before stopping gluten). I do notice when she's home on break from college she will have a healthy, nice sized portion of food at each meal and say she feels very full afterward, yet shortly after she will feel hungry again and need to reach for a snack (always a healthy one). She takes 2 gluten free gummy Multi-Vites (same as Costco brand I believe) as well as vitamin D daily.
She was diagnosed with celiac on 1/11/17, stopped gluten immediately, and her last period started on 1/13/17. For six years her period was very regular and it only changed once she stopped eating gluten. I have to believe there is a connection. The frustrating part is that nobody has any answers. I know my daughter would feel a lot better if her cycle returned. We will seek the advice of a nutritionist as well as continue speaking to doctors, but in the meantime if you have any more suggestions I welcome them (i.e., foods, supplements, vitamins, etc). Thank you all very much!