pajama fits
Those middle of the night or early morning bouts of anxiety that wake you from a deep sleep so that you can fret and sweat over real or imagined problems, all of which appear to have an inevitable and disastrous conclusion; however, when you wake up the next morning, they don't appear nearly as bad or as catastrophic.
I'm totally whipped this morning. I had pajama fits all night about that sound in the attic, which can only be explained as a pack of oversized and rabid raccoons, my furnace about to burst into flames and burn me alive, or just this old house "settling."