i agree with Juliana. there are times when I am just completely not present in what it going on around me. Nights can pass and I have no idea what I spent the time doing. ( I dont know if that is similar to what you are talking about, but I feel like it relates.) I personally have a medium form of OCD and then GAD so I am not sure if it is connected to just OCD, or like what Juliana said, the anxiety. I do know that my friend who has OCD said she understood my feeling of not being connected to life, and like I said, she's only OCD.