Antibiotics not helping ear infection

Emerald- Due 12/16/19💙👶🏼

My son is 5 months and he shows an ear infection and we are on day 5 of antibiotics And he’s still screaming in pain and grabbing his ear and it hurts for him to eat. Last time he had one the antibiotics worked 24 hours in, and these ones we have now are stronger because he has a really bad infection.

Anyone have the problem of antibiotics not working?