N.B.
Have them swab and test her for Pseudomonas. It's a completely different sort of bug.
Other than that try giving her half a dose of real Sudafed a couple of times per day. It thins the goo so it can drain down the Eustachian tubes easier.
Go see an ENT/ORL doc. A pediatrician is okay but if it's lingering then you need to go to the right doc. I'd also say tubes might be a necessity. Soon.