It could very well be the wheat causing your digestive problems, but your symptom of light sensitivity makes me wonder if you're suffering from adrenal fatigue as well.
My son has a pituitary tumor\cyst, causing secondary adrenal insufficiency, among other symptoms of pituitary hormone loss. He was diagnosed after three years of digestive trouble that included nausea, bloating, constipation and diarrhea. His first symptoms were extreme light sensitivity, abdominal pain, and dry skin. He was eight years old.
We were vegetarian also, consuming a lot of wheat and soy. I had my son tested for food allergies, and it was positive for soy, but not wheat. He had soy formula as a baby and toddler too, and I believe all the soy destroyed his endocrine system.
You should consider specific testing for celiac, and also IgG antibody tests, or saliva testing, for other unknown allergies.
In the meantime, my son was helped a LOT by taking digestive enzymes, specifically Peptizyde and Zyme Prime, from Houston Nutraceuticals, to aid digestion and help heal his intestinal tract. Peptizyde has a specific enzyme, DPP-IV, which breaks down the peptides and proteins from wheat gluten and dairy casein, the little devils that cause so many people so much trouble.
From what you've been going through, I would guess that your intestinal tract is deficient in DPP-IV anyway. I highly recommend you take an appropriate digestive enzyme blend with everything you eat (and don't ever touch soy). By that I mean take proteases with protein foods, lipase with fats, amylases with carbohydrates, etc. This can work miracles with a huge number of health problems.
Also, Slippery Elm powder is very soothing and healing to the digestive tract, from the throat all the way to ... well, you know. I drink it added to herb tea, when I feel the need. (Unfortunately, my son never would).
My son's light sensitivity problem is slowly getting better. The hydrocortisone he has to take for adrenal insufficiency seems to help with this. I think his nutritional deficiencies, caused by gut damage, contributed to the eye problems too.
Hope you feel better soon.
Enzy
It may have something to do with your diet, iff you are celiac. Every person is different, but I would start there. I ve come up with quite a bit of these symptoms, and after many tests, I was diagnosed with gastroparesis, your food move so slow during digestion, that it can furment. causilng some of these symptoms. I wish you luck, Its a heck of a life. Mary
does anyone have any ideas??