Poor baby!
The goo has to go somewhere momma. If it wasn't coming out his ears it would be coming out his nose or down his throat.
I would just keep him on the antibiotics until Monday OR if you trust yourself take him to the ER or an Urgent Care clinic.
There are some antibiotics that just do not work for me. I can take a Z-pac and then go back to the doc the next week and ask them for a real antibiotic. That's supposed to be one of the best ones out there but it's like taking nothing for me.
I can take some other kind and within a few hours I am feeling so much better.