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Have you contacted your medical team about this problem? Depending on where you live, fall can cause a lot of pollen and allergens in the air. Here in Texas it is grasses, ragweed, pigweed, etc. Depending on your allergies, anything such as this can cause you to have breathing problems. Also dried out falling leaves cause a lot of air born dust. Add in windy days and temp changes, and you have breathing problems. I would check with my medical team and get some help for this seasonal problem. Take care and God Bless!