Dear Mkdit, I dont actually understand what means "mesenteric"? Mesenteric iscahemia or adenitis
or something else? You re describing very unspecific symptoms. It is hard to get any conclusion but I have a few recommendations. You need to do complete laboratoy tests, it sounds like some systemic disease. Depending on these findings doctors can focus on specific diagnostic tests. The most common disorder i suspect is IBD
so you should do gastroenterologic exam and tests. Migraines can be triggered by abdominal pain
and opposite but i dont see any other relation.
Wish you good health, Dr. Ivan Romic (Rominho)