It is not normal to have vomit or fever when eating in 7 month old baby. He must be suffering from some kind of infection most commonly viral. Antibiotics also causes diarrhea
. Consult your doctor again. You can give enterogermina
1 respule a day for maintaining gut flora
which usually lost during antibiotic treatment, Zinc syrup 5 ml OD for better recovery from diarrhea and domstal syrup 2 ml 2-3 times a day for vomiting
. Continue feeds and also do tepid sponging to bring down the temp beside giving paracetamol
I hope this answers your query effectively.
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Wishing you good health.