I also just wanted to add that I often feel that way, as well. It usually happens at night and then I realize it in the morning and then feel bad about it and tell myself I must be really "crazy".

Additionally, there are days when I know I have done something or gone somewhere but can't really remember the feeling of being there. Like, I know I went to the grocery today, but I don't really feel as though I've left my house. That kind of thing. It's very odd.

So, I don't really have anything wise to say, I just wanted to add to the list of comments so you see how really not alone you are.