I have pain after I eat in my stomach its like...

What are the causes of stomach pain?
smoking
hot , spicy food
consuming high caffeine containing beverages and chocolate
acid reflux
hernia
H.pylori bacterial infection
stress
Signs of stomach problems :
heart burn
vomiting
bloating
vomiting of blood in severe untreated cases
severe abdominal pain
dark or brown stool
Diagnosis of stomach problems :
taking full medical history of the patient
CBC test
H.pylori stool antigen test
gastroscopy
how to treat stomach pain?
cut off all the previously mentioned risk factors and use the following prescription for 14 days then if no improvement you should visit a gastroenterologist for further evaluation
nexium 40mg twice daily for 14 days then once daily after that
Metronidazole 500mg three times daily 14 days
Clarithromycin 500mg three times daily for 14 days
If one of the following occurs , you should go to the hospital immediately
vomiting blood
bloody stool
severe abdominal pain