Epigastric pain which is the tip of your stomach could mean either ulcer or gastritis
negative ct scan does not mean you do not have a problem
stay on liquid or light diet take either Prilosec or zantac (ranitidine) from over the counter with some anti acid make sure your bowels moving ok no constipation
if your symptoms does not improve your doctor should referred you for upper endoscopy.
Would you like to video or text chat with me?