Common symptoms, but check out CFS and ME. My niece has suffered chronic ME for many years and eventually had to give up her career. You appear to spend many hours in this forum late at night, when perhaps you should be in bed sleeping, and it could be your body's way of telling you to change your habits. What do your parents think?
You are right about sleeping. I'm a bit of an insomniac, but I can force myself to sleep when I really have to. My mum thinks its exactly that and my body is just running out of energy because of a distinct lack of sleep, and I have a lot of energy!
Thanks for the info, I'll be sure to check it out.
I actually thought at first it might be mild symptoms to Sjogrens syndrome, which would be a bit of a curse as one of my favourite tennis players has it.