Hi! Good evening. I am Dr Shareef answering your query. If an ultrasound of abdomen has excluded all the conditions as noted by you, this could be due to the sensitivity of your intestines to some of the components of the food you consume daily. Specially you should avoid eating from outside, like fried, spicy and fast food. You might have to consult a gastro enterologist to rule this out. Another possibility could be a herpes zoster infection of your chest wall.Till this shows up itself by the way of some eruptions on the skin, I would advise you to go for some anti inflammatory drug along with a proton pump inhibitor drug for a symptomatic relief. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.