Hello, I'm 51 years old and have moderate COPD and I've had asthma for as long as I can remember. I had a sleep study performed and was told that I don't experience apneas but I experience hypopneas when in R.E.M. sleep. I've received my CPAP machine but I'm having a difficult time adjusting. I use the nose pillows and woke up feeling like I was suffocating. There isn't a problem with the fit or leaking. I've tried using it on and off for about 3 weeks but always wake up feeling like I can't breathe. Has anyone else had this experience? Have I just not given it enough time?