Thank you for your query at DoctorSpring.com
I understand your concern.
You're suffering from mild gastritis, and you need to start Ranitidine 150 mg, to be taken twice daily after food, along with Syrup. Sucralfate 2 teaspoons after meals.
For your nausea and vomiting, you need to take Tab. Ondansetron once before meals. That will control your vomiting. The other two will help relieving your gastritis.