Hello Dark Dreams,
Welcome to pc. I know what you are going through and you're at the tail end of a section. When that hits, it's easy to become overwhelmed with everything that you have to do and put the time and thought into a dissertatio as well.
But Imagine your pride and relief when you have completed everything and you can relax. When you have written your papers and as usual go over every word and think "Oooh! I shoulda wrote this or that". But it will be completed and done and over.
Wishing you luck, get fired up!