Hi Tim, welcome back, this really is a great community for providing support when you need it. I'm relatively new to the PB lifestyle (3 weeks in), so I can only share anecdotes on what I've experienced so far.
I've managed to dodge a bullet on the carb-flu, with energy levels higher than ever. While I'm not 100% strict, I've been pretty close and have found I'm sleeping better than ever. I'm not sure what your daily schedule looks like, but if you have time to get in a workout, either moderate cardio or some bodyweight training, that may go a long way in helping you get to sleep at a more reasonable hour. I've also found that I get tired much easier if I turn off all external stimulants (television, bright lights) and curl up with the Kindle. I believe Mark also mentioned in the book that you shouldn't be drinking/eating right before you try falling asleep.
The other thing I took away from your post was that you were overthinking it, a lot. By worrying and encouraging negative thoughts about carb-flu and "wired and tired," it sounds like this alone could be raising your anxiety and being counterproductive. Not saying you need to light incense while mediatating and thinking happy thoughts, but just carve out some time in your day to do something you enjoy as an outlet for accumulated stress; or as Mark says, "Play."
Finally, if you find yourself lying in bed at night with your mind racing, keep a notepad by your bed and write down what's bothering you. The act itself can help ease your mind and in the morning help you to focus on priorities for what you need to accomplish.
Best of luck-