Sleep? What's that?

I wonder how many people with Parkinson's are awake simultaneously each night? I never had trouble sleeping, in fact it was one of life's greatest pleasures. If I was feeling stressed or had a lot to do the next day I would occasionally lie awake and not be able to relax enough to fall asleep, but I found that if I made a list of everything that was on my mind I was usually able to calm down enough to get to sleep quickly. I kept a pen and notebook by my bed for that purpose, and also so that I could write down my dreams should I wake and remember one. What I'm experiencing now is new for me. I fall asleep without much trouble but frequently wake up a few hours later and then the night proceeds one of two ways: Scenario #1 - I wake up, wide awake, look at the clock and see that it's only midnight or so, but I feel like it's time to start my day. When this happens I usually wake every hour on the hour until morning. Scenario #2 - I sleep fine until 4am or so, then I'm so awake that I can't go back to sleep so I get up, write emails, make jewelry, shop online, etc. Sometimes I'll get back in bed and sleep for an hour, then I feel groggy all day. Some nights I sleep through the night but those nights are becoming more rare. The worst consequence is that I dread bedtime, it's no longer a sanctuary, it is torture. I've tried exercise, melatonin, meditation, counting sheep, I don't drink caffeine after breakfast, etc. It is the Parkinson's because I've heard this complaint from a lot of PD people, and I've heard that the chat rooms light up with PD people late at night. What is it about the disease that causes this behavior? Although it is recognized as a symptom and problem for a lot of people I don't think researchers know exactly why this is so. I'll see what I can find and add some links if I find anything interesting. In the meanwhile, avoid telling me to "sleep well".