Again insomnia When I fall asleep, I wake up because I can't breathe. …

Again insomnia When I fall asleep, I wake up because I can't breathe. Lately, I only breathe through my mouth because it seems like not enough air is getting in through my nose. Can you tell me, maybe with some inhalers you can use? Do you know about those transparent shells with tubes like in movies?) Impossible to breathe, I want to take a deep breath, but no way, I blow air into my nose with an aqua-marine, but still it doesn't help