I can of course not assess your breathing difficulties at all but maybe it's just the non-pathological https://en.wikipedia.org/wiki/Nasal_cycle https://en.wiki

I can of course not assess your breathing difficulties at all but maybe it's just the non-pathological https://en.wikipedia.org/wiki/Nasal_cycle https://en.wikipedia.org/wiki/Nasal_cycle ? Although the Wikipedia article says that usually one should not notice the effects.