My son is seeing a pulmonologist for sleep apnea next week, and his allergy doctor wants extra meds now..?

I'm not sure of the rationale behind this, but the allergy doctor claims that my son's pulmonary doctor won't be able to see anything other than allergy symptoms and won't go any further into his possible sleep apnea, unless his allergies are neutralized this week with aggressive medicine. So the sleeping problem might be diagnosed as "allergies", since they're such the obvious problem (unless these meds have him totally controlled, by a miracle). I am frightened that my son's allergies, severe this time of year and year round, will never be contained enough to see if there's something more. Like, when does he NOT have allergies that are severe? My allergist is very good and ures me that the new sample she gave is excellent (Astepro) in conjunction with his nasal steroid and Claritin and he'll probably be allergy-symptom free by the time the pulmonologist appointment rolls around. (1) What might the pulmonary doctor will say in either situation? and (2) are these meds good enough to hold back his severe allergies? If anyone could provide feedback on this I'd be happy!