I have pain in stomach after back from the toilet pain i like sharp i feel heart beats on tummy near chest pulse heart is kinda fast i this can be due heart problems or stomach i dont have apetite..

Abd pain s/p toilet: Was it momentary or is it ongoing? Straining during bowel movement? constipated? Could be reflux (try famotidine), spasm vs due to autonomic effects with bowel movement ( elevated HR though usually not pain) . Cardiac etiologies less likely unless underlying connective tissue disease like Marfan's/ Ehlers Danlos Follow up w/ urgent care/MD