The antibiotics may not have had enough time to completely get rid of the infection so if your child is still not well, I don't think it is unreasonable to go back to the GP and ask for a prescription for a diff AB.

Yes, you can continue to give panadol, but like Mantaray said, I would be disinclined to give it for a long period of time. If she is still needing it for pain (or fever), go back to the GP. You could also consider giving neurophen which has a longer acting time than panadol.

HTH and hope your little one gets better soon.

MG