Have been using a cpap machine for about 3 months. When i first got the machine wow i felt alert and awake and rested for the first time in years. After a few weeks though i started to yawn in the am alot as i did before and didnt feel the sharpness i had from the sleep i had been getting. I was opening my mouth when i was sleeping though i wasnt breathing with my mouth the doctor said i was loosing pressure. He gave me the blue velvet triangle mask and i dont think it works any better as a matter of fact i feel worse. He gave me a perscription for another mask thank God a smaller one the liberty mask. He feels this is the remedy.I feel like maby my pressure is in need of changing. I would assume i have a cpap machine i dont know if it has the features to monitor its effectiveness. I would appreciate any info thanks in advance.

Douglas Pavone