I FARTED in my sleep

I'm pretty sure I sleep better now  at 250 than I did at 450 but I'm not apnea free. I've slept a couple of nights w/o it and my wife tells me that I still quit breathing w/o it. But I'm thinking that maybe I could turn the pressure down a notch or two. I'm prescribed at 18 and had the RespTherapist set it at 16 due to it squealing like a pig at 18. My problem now though is that I wake up in the middle of the night with bad gas cramps cause it has pumped me full of air that I've swallowed. I spend the next hour letting out some of the most ungodly farts you've ever heard or smelt in your life. And I mean fart in the traditional sense. Maybe if I could turn the pressure down I'd swallow less air. I think I'm gonna hit my doc up next time about referring me for another sleep study.