J.H.
I've had my eardrums burst from infection so many times it's not funny. If he had an infection, and then the eardrum burst, he would not have been in pain, this would have released the pressure and the pain would be relieved. (I'm saying this from personal experience.)
My ear will typically drain for anywhere from 5-8 days after it ruptures. I wouldn't be surprised if it starts to slow down here soon.
Good luck to you mama!