I have had a colonoscy and everything came back normal.  BUt I have had ongoing pain in the abdomen for 6 months of so.  Cat scan showed nothing.  My Dr, cannot see me till end of May.  Meanwhile I take a generic, Levsin, that sometimes helps with the pain and like now doesnt.  It starts right in the middle upper abdomen I guess below the sturenam.  It is a deep pain.
You may be suffering from peptic ulcer disease with spasms of gastric outlet. Please take a proton pump inhibitor like omeprazole or pantoprazole daily empty stomach in the morning. Avoid high spicy foods and alcohol and high fatty food stuffs. If this is also not helping you with the pain, please go for upper gastrointestinal endoscopy and look for serum lipase and amylase during the pain.