I'm right there with you. I was feeling so weird on Thurs. that I told dh I thought I would probably go into labour in the next day or so. I didn't, but definitely feel like my body is gearing up. The only problem is that my super exhausted times are coming right at the peak of my 2 year old's energy level, at around 10 am. But yesterday was the craziest, because I was so tired and ds was so tired from Christmas stuff that I decided to try to put him for a nap early. he wouldn't go to sleep, and so even though I could barely keep my eyes open I went and . . . scrubbed down all the walls and doors in the house. Holy nesting, bat man.
I also find that along with my physical symptoms its really hard to focus on anything outside of my body. This is not making my son happy or my house tidy at this point, but I think its what I need to do.
I'm trying not to get too excited, though, becuase I felt like this at 38 weeks last time, and ds didn't arrive for another 3 weeks.