((That link was awesome!))

As for the rough patch, I also had one in the last months, it was like that hopgobblin thing and now its back under control - which I felt could very well never happen. I kept thinking about everybody I know that gave up on their PhD and I felt so understanding towards them and almost envious...

Take a few days off and FORCE yourself to do nothing for at least a week to 10 days and sleep as much as you can...things will probably better after and you wont be so exhausted mentally trying to force yourself to work all the time.
You might be able to focus easier and the real challenge is starting, right?

Best of luck!