For the first time in ages I drifted off to sleep within half an hour of hitting my pillow and went into a light sleep. About 2 minutes later there was some random bang bang bang noise outside the window, which cut through the white noise I have playing, and I woke up. Looked out the window. Nothing. Went back to bed and at some point managed to drift off again. Woke at 5am, stayed in bed and got maybe another hour then stayed in bed awake until about 8.30am. Had a few dreams so at least got into REM sleep. Period between about 1am-5am shows low curve for heart rate which matches when I was likely sleeping. It's not enough, but amazing how much difference even a few hours of sleep can make.