sardonisms

I just started using the ResMed AirSense 10 Autoset about two weeks ago. Within a week I had to have them turn down the pressure; it was initially set at 4-14, but I couldn't breathe properly and was waking up several times a night to expel air that had inflated my mouth, so they changed it to 4-9. This already seems fairly low considering some pressures I see on these forums, but my apnea is fairly mild and I am getting better sleep with that plus Lunesta (CPAP can't fix raw insomnia). However, I'm finding myself waking up with a lot of grumbling stomach noises and very unpleasant feelings of air bubbling in my stomach. I have digestion issues which also create excess gas and cause it to be trapped in my chest, leading to lightheadedness, dizziness, and a feeling like I'm overheating. That I am apparently swallowing air with the CPAP is compounding the effect, and that air is behaving the same way as what I experience anyway, i.e. being trapped in my chest and making me feel dizzy and feverish.

I do not think turning my CPAP down any further would be effective against the apnea, and I have been told this will get better as I adjust to the CPAP, so my primary concern is functioning normally during the day (as you can imagine, lightheadedness and dizzy spells make it very hard to get through a work day). Has anyone experienced this, and is there anything you can do on your end, without having pressure adjusted, that alleviates this? Any medication that works (I had Pepto-Bismol on hand so I just took that, but I have never tried anything else specifically for gas), or changes to routine before bed?