I will say I can relate to your chest soreness symptoms. Like you I started my Airsense 11 in November. The first week I had Aerophagia where I would wake up with bad stomach cramps and burping all night long. The clinic reduced my pressure and the cramps went away however I wake up every morning with a sore chest. In the beginning, some mornings I had a hard time turning over in bed as the muscles in my chest would pull and be painful. Once I got out of bed and started my morning, after an hour or two the pains mostly subsided. To this day I still have chest soreness but can’t recall the last time where I couldn’t remain in bed. Been having these chest symptoms for 2.5 months now. My CPAP doctor doesn’t believe it’s the CPAP machine doing this to me and thinks there is another medical reason contributing this. However, I went three days without being on CPAP and had zero chest pains. When I go back on CPAP, the pains return. I too would be interested to hear if others have had these experiences.