Diagnosed with OSA in 2017. Have used the Airsense 10 every night for 3 years and take good care of it. Full F20 mask with heated hose. AHI "Events" has always been between 0 and 5. All of a sudden, for 8 straight days now, my AHI "Events" are in the 30's and 40's. Would someone advise me what I am ...