Lots of painful awakenings because of bastard migraines, but cluster headaches at 02:41 every morning for a month was utterly horrific.
I woke screaming once, convinced I'd been stabbed in my sleep because nothing else could explain the pain in my back and arse. Nope. Sciatica aged 23.
Although a memorable one was waking to someone banging on my 3rd floor bedroom window about 2am. There was a fire escape out the flat there. It was also the day a man had been sentenced for murder in the flat below me, so I was convinced it was connected with that. Took me nearly 20mins to unfreeze in terror and crawl out the bedroom to phone 999. Got an almost immediate police response as I heard them yelling at someone in the lane.... it turned out to be my shag piece who had decided to play Romeo, and somehow thought this would be romantic. Police call handler asked if I wanted to make a complaint about him - I asked them to tell him to use the front door and the doorbell next time! 😂😂