Lynx, I've been going through the same thing when trying to sleep, it's just anxiety but I went to the doctors and he prescribed me some beta-blockers to sort of calm my nerves and a few sleeping tablets. Kalms work well too if you wanted to try that, it helped a bit for me.
As for what the dreams mean, PM me or let me know on MSN and I can look it up in my dream dictionary (cos I believe in that stuff

)
Hope things get better soon xx