Thanks for the query.
The bouts of vomiting
most probably is due to stomach bug.Occasional vomits should not be worrisome.However if the vomits are multiple then an antiemetic is recommended and a re examination with the specialist is required.
You also mentioned the ear infection
.Was the child on any antibiotics because sometimes these could upset the tummy I.e antibiotic induced diarrhoea
in which case probiotic
Continue with the normal feeds and keep child well hydrated .