The Rumination Syndrome doctor at Children's Memorial in Chicago is Dr. Chogli. He is excellent. Talk to the nurse and insist (nicely) that she fit you in immediately because the problem has gone undiagnosed and misdiagnosed for x period of time. When I explained that he fit me in within 2 days.

He will then refer to one of the speech therapists that is trained in the diaphragmatic breathing technique. You cannot get to the speech therapist without a referral from a doctor for this specific breathing technique.