One week to go in the final PhD submission and I have lost the will to work on it. Help!
I agree  with lostsoul29, but I will add a couple of additional thoughts as that answer did not address all aspects of your question.


For your neck pain, I recommend using Tiger Balm (specifically, the patches rather than the goop which can be messy).  After writing much of my master's thesis on a laptop while sitting on a couch, I developed "military neck," or a loss of the natural curvature in my neck.  The pain made it so hard to sit at the computer b/c that's what aggravated it most. I get chiropractic care for that and have had success there, but for you, you need an immediate solution and, as I said, Tiger Balm.
Remove your TV.  Sounds like this is your crutch.  It's easy, it's there and when the volume is loud enough you can momentarily ignore the stress you're feeling.  Maybe you can simply unplug it to make turning it on a more conscious decision, but I would go so far as to ask a friend to store it at their apartment for the time being.  This may sound dramatic, but it's extremely effective.
Go for a run, or some sort of vigorous cardiac exercise. Take just 1/10th of the time you've been watching TV and exercise instead (that is, you clearly have the time so that is not an excuse).  Not only is this a great way to increase blood flow to your brain and help clear the fog, it will help with your neck pain as well.  That was the only other thing that helped mine (besides Tiger Balm and, eventually, getting treatment).
Be kind to yourself.  So you took a couple days off? Big deal.  Do not be mean or self degrading.  Move on.  Do not think about how much there is to get done, just do the next thing. And then after that, do the next thing. Rinse and repeat. When you start that negative inner dialogue try stopping it quickly. My mantra is something like, "that thought doesn't serve me well, let's move on." When I start thinking of the next 5 things I have to do, I think, "just do the next thing," repeatedly as a way of focusing me on the task at hand. These might seem cheesy, but I find them effective, and you may need them if you follow through on step 3 and no longer have your TV to drown out your inner dialogue. 


This answer is based on my own experiences being in your position.  I am terrible procrastinator so, sadly, I have lots of experience in this department. Wishing you the best of luck!