You could call an after hours emergency clinic and ask them if it is ok to use Polysporin ear drops. They are safe for human use, but I'm not sure if it is ok for dogs, some products are , like Benydrel, polysporin creams, etc, but you could get advice from the emerg vet and see what they say. If they say its ok , it may help until you can get to your vet. I'm not sure though, maybe someone else has some advice. Good luck, hopefully it's not too serious.