How to get more motivation?

I'm 28 years old, but sometimes I feel more like I'm 68. I feel tired and worn out all the time, constantly under stress. My life has been very stressful, but now I feel worn out and stressed even when I'm not doing anything.

I am in my last year of university, and it has been very full on. I am doing a vocational degree and fifty percent of my course is spent on placement. It has been like a 3 year job interview under pressure, and I finally passed my final placement, but instead of being over the moon and exited about finishing, I am just brooding over all the things I still have to complete rather than doing them, eventhough there is not much left to do now and it should be easy as long as I get on with things.

I still have to sort out my portfolio and I have a couple of resits to prepare for. However I cannot seem to get the exitement I had at the beginning of the course any more. I find it even difficult to get out of bed and get a shave or get ready. The more I think about it being important, the harder it is to do. I really had to push myself to get this far, but I just want to know some tips about how to cope under pressure and how to be more self motivated, which I have been, but it is just always a struggle and its no fun feeling fed up most of the time. I have worked very hard and began with lots of ambition, but now I have nearlly acheived it all the 3 years of putting pressure on myself seems to have taken its toll.