Woke up too early

I just don't understand this waking up too early. Last night was the second night in a row I had not used the Ambian to get to sleep and I guess it is just taking some time to really accomplish, but I guess my mistake was after getting up to go to the bathroom, I went to get a piece of cheese and maybe I hsould have just gone back to bed without going into the kitchen. I basically tossed and turned until 4:30 and ahve been up since. It is very frustrating and am sure i will be talking a nap this afternoon. I may take one this evening and then not take one tomorrow night so we will just have to wait and see.