I was like this a couple of months ago matey. Im on it again now and feel fine again. Do you have a hobby or anything?
Ive applied to become retained firefighter and am working towards that, been getting fit and attending a couple of there training sessions and its built me up.
Like everyone else says, go enjoy your holiday chin up. Ive chilled out a bit with my work now, i have £x amount i want to earn a day if i do that before 12 o clock im a happy man and then i can just plod. Get some music mp3 sorta thing going, i have my phone on me with loads of tracks on with prodigy pumping in my ears

gets me going.
Someone offered me £8 ahour the other day to do a pressure washing job to which i smiled at then realised this is what most people are getting that these days, we can do a £8 house in 5 - 10 mins.
