My 4 year old woke up with a fever Saturday morning and I took him to urgent care and they did a strep and flu test. Flu was negative, strep was positive. Got some antibiotics and he’s taken 5 doses since Saturday and is still running a fever. He also has a very stuffy nose and doesn’t feel well at all. How long would you give the antibiotics to work before taking him back in. It’s been almost 48 hours on antibiotics now.