Today I started a new job (cleaning cars). I was really looking forward to it, but for the last two nights I've had the most awful insomnia, it's like my mind and body are exhausted but I just can't turn my brain off. My body feels slightly numb and kind of heavy, I'm constanly on edge and anxious and when I do finally manage to start slipping off to sleep I suddenly wake up just as I'm losing consciousness, apparently scared that I'm dying rather than falling asleep.

After I finished work today I was so exhausted I thought I was going to faint or collapse or something similar. My body felt weak and shaky, I was finding it hard to concentrate and I felt like I was a million miles away, like I was disconnected from my body or something. I was worried that I was dying or going crazy. The worst of it lasted about half an hour, but I managed to keep completely quiet about it and not show that anything was wrong - I didn't want my new boss to think I was a wacko on my first day. Thankfully I'm feeling better now, but I still feel kind of spacey and very tired. I have had this kind of thing before, too, but today seemed to be the worse I've experienced. I haven't seen a doctor or anything yet, because I don't want to worry my parents (I'm 19 and they have more than enough to worry about, with us being nearly broke and all).

Has anyone else experienced anything like this? Was it a panic attack, or something else (I didn't have any of the chest pains, choking feelings or cold sweats usually associated with them). Am I going mad? I seem to be simeltaneously exhausted and restless. Also, does anyone have any tips for getting a good night's sleep?

Thanks.

EDIT: Crap, I just realised this should probably go in the Anxiety forum. Sorry.