Abdominal pain 11 year old boy

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My son has had abdominal pain on and off for about a year. Really bad this week. He has missed 4 days of school. All blood test so far normal so Dr doesn't know what to do. Tried excluding diary seemed to help at first but came back. He was upset about going to school today I felt awful but felt he had to get back. He is pale and very tired but not anemic. Waiting for a gastro consult. Spending all of our time obsessing and googling symptoms which is not helpful. Any ideas out there?

Wheat intolerance?
Does he have any bowel symptoms or is it just the stomach pain?

Another thing to possibly look at us abdominal migraine.

Just found out his Iron levels are high and his thyroid function TSH is high(which points to an under active thyroid) off to Drs tomorrow again. Really worried.