That's a good start. They will look into your ear canal with an otoscope and see if the eardrum is occluded with wax. If it is, they may clean it out or tell you how to do it. If the eardrum is visible and is red, you have an ear infection and they should prescribe an antibiotic. If the eardrum is gray (normal), then they need to check if you have fluid in your middle ear. This is usually done with a tympanogram, a pressure test. That will most likely have to be done by an ENT unless your primary care physician is a pediatrician. If you have no fluid in your middle ear, you need to see an ENT and have your hearing tested.

Good luck.