That's certainly one of the first things they checked for, which is understandable.

They started with a home sleep study (you pick up the equipment and are shown how to put it on before bed), but it showed that my breathing was fine, blood oxygen levels were normal, and I snore less than the average person.

So that's when they had me do the full study where you sleep in a lab hooked up to monitors to track breathing, brainwaves, muscle movements, etc.