can't sleep

It's 1:00am and I can't sleep. This seems to happen to me about every other night. Last night I had wonderful sleep and only woke up to use the bathroom once. Tonight I could hardly fall asleep at 10:30 and then I was up at 11:30 and 12:30 to go pee. Go figure. I think I'll try resting on the couch for a while and reading a book. Usually I'm ready to go back to bed within a couple of hours and I sleep the rest of the night just fine. The baby is awake too and kicking much more than it has all day. Maybe this is preparation for walking the floor at night and trying my hardest not to wake up Andy! I know it will all be worth it when the baby get here. I just want to make sure I sleep enough each night to keep myself healthy and to have enough energy for when labor does start. I would not label myself "impatient" just yet, but it is a little frustrating that everyone keeps asking me why the baby isn't here yet when we aren't technically due until a week from Wednesday! I know it is just because people care about us and are excited for this new member of our family to arrive! It just makes me feel like I am already overdue when we're not even due yet. I just worry that the baby will come a couple of weeks late and then these last 2 weeks + those 2 weeks will really feel like forever! Luckily I still feel very good most of the time and have no complaints aside from the lack of sleep. Well, I should at least lie down and attempt to get some rest. Any wisdom about how to get back to sleep when your body is huge and your mind is running 3,000 mph?