If they gave you a throat swab and found that the infection is viral they would be irresponsible to give you antibiotics as it will do nothing. If it is bacterial and not going away on its own then after some time antibiotics will be prescribed.

The overuse of antibiotics is terrible here. Also, antibiotics in babies (even before they are born) can cause their teeth to yellow and help build up antibiotic resistance so if you really need them, they may be innaffective.
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"Diplomacy is the art of saying 'Nice doggie' until you can find a rock - Will Rogers"