I’ve been there, but to much lesser extent. I also get the thing where my brain decides to wake me at 2 am and remind me about every idiotic thing I’ve ever done in my life.
I’ve also found that staring at a screen (computer OR television) too late into the evening trips my “stay awake” sensor. (I wonder what something like a Kindle would do to me, seeing that most of my “entertainment” reading is done right before bed.)
fillyjonk is right, both in terms of the literature and my personal experience. I find I cannot write at night anymore, because I continue to process. I take a half a Zyrtec and go to bed with The Wife (earlier than I’m otherwise inclined)