I Have Been To Several Doctors In The Past Year

i have been to several doctors in the past year because my stomach and right side under my rib cage has discomfort. i was very nauseaus foir a long time. everytime i ate some foods i would be nauseaus.it has gotten much better but i watch what i eat. it also bothers me when i am sitting for a long time. feels like my ribs are sitting on something. i have had lots of tests and the only thing they come up with is my stomach is not emptying correctly. can this be corrected?