It detects events when I’m awake which led me to suspect it was not working properly. According to Cpap forums awake readings are invalid, but sleep measurement

It detects events when I’m awake which led me to suspect it was not working properly. According to Cpap forums awake readings are invalid, but sleep measurements are? I’ve had a sleep study which determined I need a Cpap machine but they never did the study while wearing it and my readings vary greatly from 3 to 30 AHI per hour with it on. In hindsight, I have exceedingly “freakishly” large lungs which may explain the slow breathing. My concern has been waking up with a daily headache which has been suggested by other doctors to be due to uncontrolled sleep apnea.