Baby vomiting after feedingPlease advise medicine...

What is the treatment of persistant vomiting   ?
1. consult an internal medicine doctor to do the needed medical examinations and determine the treatment pathway 
1. in case of H.pylori infection , doctor will prescribe antibiotics such as - clarithromycin, metronidazole , amoxicillin
3. doctor may also prescribe  famotidine to relieve nausea and vomiting 
4. to reduce stomach acidity , you may used PPI medication such as omeprazole and anti acid medications such as ranitidine
What are the causes of persisitant vomiting ?
1. over feeding
2. stomach infections 
3. medications side effects 
The needed medical examinations :
1. physical examinations
2. blood test
3. stool test
4. stomach endoscopy ( if needed )