I have stomach uncomfort since 3-4 days , no pain but fee constipated and also feel full. it feels like my stomach is tight after eating. what could this be , my pcp did blood tests and found nothing all vitals are under control?

When was your last bowel movement? Was the stool hard? Your symptoms could be related to constipation-perhaps you are not having frequent enough bowel movements and/or the stools are hard, making it difficult to pass the stool. An over-the-counter stool softener may be helpful so ask your doctor or pharmacist. If the problem persists, seeing a GI doctor may be needed. Good luck to you!

If constipation is the underlying cause of your symptoms - You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. Consult this site for fiber foods. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948