Welcome to HealthCare Magic. Thank you for posting your query. I can understand your concern. You could be suffering from irritable bowel syndrome or gastritis or gastro-esophageal reflux disease or peptic ulcer disease . It is difficult to make a pin point diagnosis without actually examining you. You may need an upper GI endoscopy and a colonoscopy to help the diagnosis part. I would suggest you to - Stop the diet pills. - Drink loads of water - Avoid oily,spicy food - Have a diet rich in fibres - I would start tablet Pantoprazole and tablet Domperidone. Your doctor can guide on the exact dosage - Get a blood haemoglobin , total count ,Liver function test , amylase , lipase, urea , creatinine , ESR done - Get an abdominal ultrasound , an upper GI endoscopy and colonoscopy done. This will help in the diagnosis. I would also suggest you to visit a physician . He/she can examine you and correlate clinically. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.