Vitamin D deficient and wheat allergy

[mcv1]

My daughter has been poorly for quite some time, regular visits to the doctors were very unhelpful, they didn't know what it was and kept telling me it was a virus.
I made an appointment with my doctor who was very helpful and suggested this might be a vitamin D deficiency and a wheat sensitivity / allergy and being referred to the paediatrics.
Firstly I would love to hear from any one who is dealing with this as a parent or going through it themselves.
I'm struggling to think of packed lunch ideas for her to take to school etc so any recipe ideas would be great, or anything you buy from the free from range which you recommend

Hi, I had twins a few years ago and felt absolutely terrible. Pains all over, exhausted, dizzy and down. Blood tests showed a severe vitamin d deficiency and I was put on tablets for 6 months. I was also told to get out in the sunshine so we went abroad. Vitamin d is found in eggs, liver and oily fish so try to get her to eat these. A year on I felt like a different person. Can't help you with the wheat though. Hope this helps.

Potato salad
Mixed bean and Tuna salad ( add tomatoes/ grated carrot/ cumcumber / etc)
Greek ish salad ( cumcumber/ olives/ feta/ tomatoes/ anything else she likes)

Add chicken/ cheese/ fish etc to anything like salads/ veg ( mixed roast veg is nice

The free from pita breads are nice and can do with any filling

How old? And also use a Themos to keep foods warm. Then you can say eat meatballs and rice at dinner and save her a portion for lunch the next day

Thanks for your replies :)
She is 9 years old. Louise3louise3 how long did it take you to recover from your symptoms?
The GP doesn't seem interested n doing tests, so I have asked to be referred to the paediatrics, she has been taking vitamin D now for 2 weeks and reduced wheat intake for 2 weeks which for the last 4 days I have cut out completely.
However there doesn't seem to be much improvement.
It tears my heart out seeing her like this I wish the doctors would do tests so I know what I am dealing with, at least then I would know if I am doing the right things to help her, instead of fumbling round in the dark :(
Forevergeek, thanks for the food suggestions, she didn't really like the pitta breads but I turned them into pizza's which my son loved too, which is a bonus as she was happy knowing they were eating the same things.
To try and make it interesting for her we have done some baking together, unfortunately I am not a natural in the kitchen so we have had a few disasters lol
Hopefully things can only get better :)