Heya! Wow I'm so sorry to hear this. I haven't exactly experienced breathing issues during a cataplexy episode but a lot of times I feel as though my throat muscles will tense up and no sound will come out for a while. Maybe that's similar to your experience but in your case it actually restricts the air flow. This is pure speculation but it could be a possibility. Have you asked your doctor about this? Thanks for sharing! Take care, Iris xxx