Hi and welcome to our little MS community,
hmmm tricky because you do actually have an allergy to
wheat, and that does cause bloating,
stomach ache, diarrhoea/constipation etc and IB bowel issues can also cause those problems too. MS can also be responsible for gastrointestinal issues too, beyond being aware of spinal cord lesions causing bladder/bowel/sexual dysfunctions, after reading this research snippet there may be more to it....... http://www.ncbi.nlm.nih.