Hi! I am new to the forum. I have been using a CPAP for 15 years. Over the past yaer I have had some challenges with treatment. This has been unexpected bc I initially had no issues with treatment. My weight has not changed (unfortunately-I could stand to loose weight). My challenges have been mouth breathing, then switching to a full face mask, followed by swallowing air and waking with discomfort in my abdomen as a result. My pressures have not changed and I have had my CPAP functioning tested. Any suggestions you can provide would be helpful.