Pressure Problem

yet another newbie with a question. the diagnosis is moderate OSA, about 240 events per hour, with o2 sat as low as 81%.

after a few nights with my machine, i've discovered that while i'm happier with it than without it, i do wake up a couple times a night with the air blowing in my face so hard that the air pressure overcomes the straps and the mask leaks, usually into my eyes. breathing normally into the mask doesn't get the pressure to go back down; to reset things so i can go back to sleep, i have to turn the machine off and back on.

what am i missing here? does it need adjustment? do i?

thanks!