I just learned about "nocturnal panic attacks" in one of my classes and this sounds like the it could be the case with you, Angel, even though you think it could possibly be sleep apnea ( i remember your previous post:-). Trying looking that up to see if those symptoms match the ones you are having. Nocturnal panic attacks are common and many people wake up out of the blue gasping for air, have a racing heart, sweat profusely, are short of breath etc. But get it checked out anyway to ease your fears. I also read that chronic arousal of anxiety during the night could be a kind of protection against sleep apnea, I guess as a way to wake you to correct your breathing. If this happens for you often, it isn't totally out of the question but don't let it worry you too much. I went through a phase when my anxiety was at its worst that I thought I suffered from sleep apnea as well and I don't and you are probably fine too. Hope this helps you. Keep me posted!
~Isabella~