Sleep apnea will cause you to stop breathing for so long that your brain will bring you alert to get you breathing again. I frequently wake up gasping or otherwise feeling like I've run a race, with a pounding heart and flooded with adrenaline, but I am never able to remember if I was having a bad dream or if something startled me awake.

Good luck getting to the bottom of this. Let us know how it turns out, okay?

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