Just stick to spoon feeding only if child is vomiting then it may be a gastro-eosophageal reflex seen in some of child. This is because bottle feeding has many more disadvantages. You can give syrup Ondensentron or domperidone for vomiting for 1-2 days and see the response. And give more of Breast feed only avoid formula feeding for next one month if possible.
Next Steps
stick to BF and formula feeding (as and when required only).
start complementary feeding after completing 6 months.
Health Tips
if vomiting is severe ( very frequently and large amount) or greenish or child become irritable or intake decreases, do consult Pediatrician in person.