Hi, I sometimes wake up in the middle of the night suddenly, unable to breathe properly unless I pick my left nostril to move, what appears to be a mucusy thing which feels it goes down the back of my throat. If i can't feel it, I have to pick my tooth which is a bit loose, this then has an affect which loosens mucus. In short I feel mucus blocks somewhere inside which interferes with my breathing. I've had blood tests, ECG, and chest X-ray, but I'm told I'm fine. I know I've ranted a bit, but can you help?