I think OP's major problem will be falling asleep again (given how late it is) to then be able to wake up on time with enough sleep to function through the day.
And, from my experience, sleep (or better: your desire to fall asleep or ability to wake up at specific time) does not correlate to tiredness. Sure, there is some dependency on that, but it's just one of the factors.
Disappearing thin translucent scroll bars. It's so inconvenient.