Nightmares

The other night, wearing my cpap, in the middle of the night, I woke up and I felt like my mask was going crazy. I felt like my face was swelling, I felt tingly and swore I was having some kind of sinus attack. I was certain that when I woke up my face would be huge and I wouldn't be able to breathe. The next day, strangely enough, my face looked fine and I could breathe fine. Huh? Ok, so I thought, I'm going to clean the cpap good, change the filter before wearing it again. So before that I slept one night without the cpap. I had the same thing happen without the cpap! Omg! I had the same reaction but woke up ok. I've always been a vivid dreamer and dream alot but am I dreaming this? It was so real to me!