Hello! Thank you for the query. Its hard to give precise answer not knowing the pain location. If your pain is in the upper middle abdomen, does not radiate to the back, nausea is present, peptic ulcer is most probable. If you have upper right pain radiating to the back, nausea and vomiting, gallstones or pancreas issues are most possible. If your abdomen gets bloated, you get occasional gas and stool obstruction, there is a blood in the stool, partial bowels obstruction is most probable. Is suggest you to visit your doctor. Abdominal X-ray, abdominal ultrasound, blood work, liver tests, pancreas tests and urine analysis should be done at first. If peptic ulcer seems most probable, gastroscopy should be done. Hope this will help. Regards.