I have an Interstitial Lung Disease. (Hope I spelled that right). I used a CPAP machine for a short time and then it was changed to a Bi PAP machine. I have only had the Bi PAP 2 nights. Night One- I woke at 3:30 am with a very sore throat and the pressure from the machine was making my throat burn, so I had to take it off. Night Two- I woke up at 2:00 am (last night) with uncontrollable sneezing.The amount of stuff I was blowing out of my nose was ridiculous! I was very congested in my nose and head and it has not stopped. Am I having an allergic reaction to something? Or is this something else? Not sure what to do. I also have a pressure headache!