HI I used a full mask for the first time, and when i got up in the morning i started passing gas and it lasted for hours. Has anybody had this problem?

Hi All I have had sleep apnea for six years and have used my CPAP for about one year. I have a problem with swelling ,my face in the morning looks like a blowfish, the doctors can not give me a reason why. In the past eight months i have swelling in the legs the doctors tell me this could be caused ...