Hello, Welcome to Health Care Magic. Thanks for writing. I am Dr. Saddiq ul Abidin. I have read you question completely, i understand your concern and will try to help you in best way possible. The two most important things about diabetes is always, whether its is controlled or uncontrolled? and complicated or uncomplicated? In your case presence of gastroperesis, indicate Autonomic Neuropathies, as you mention in your words as having a bad colon. Another common problem with diabetes is increased tendency to catch infections. Catching a chest infection can be one of those. Here, it would have been more appreciable if we had known any smoking history, current or past, or any history of shortness of breath, presence or absence of sputum, because each of these would decide further line of management. Currently, if your GP suggest it to be because of acid regurge, you can try taking stomach medicines including antacids and motility agents, like Omeprazole and domperidone after discussion with your GP, and if the symptoms persist, then you can proceed with further evaluation regarding a chest pathology. Along with chest X-ray, you may need to have complete blood count, ESR, CRP, as well as sputum or blood cultures. A thorough, throat and chest examination, to rule out any signs of respiratory tract infection would let your doctor decide for the use of antibiotics along with antihistamines (n anti allergics) as well need for a good anti-tussive (cough syrups). Meanwhile avoid oily, bitter or spicy foods and try taking steam inhalations to avoid frequent bouts of coughing. I hope this answered your question.If you have more queries I am happy to answer. Otherwise rate and close the discussion Regards, Dr.Saddiq ul Abidin M.B.B.S(Licensed Family Physician) Resident Medicine.