My dog has a very severe infection

My dog has very severe ear infections, his ears are swelling shut, I am giving him antibiotics that were prescribed to him , Polysporin ear infection drops (for humans ) to help with the pain, I cannot get him back into the vet till Friday 15th any recommendations to help him feel better? I am really worried about him . He has had chronic ear infections his whole life , we think now that it’s mites or just his floppy ears. I really hope he is going to be okay . Any recommendations to help his pain or prevent them in the future? Obviously we will be discussing this with his vet but I feel so bad he was just sick and peeing blood and had to go to the vet my poor dog just cant catch a break.