Hi Group,
I have kind of same problem , people around me always complain that i am not mentally present. I am always in my own thoughts. My wife usually complains that i am not paying any attention. At work i get get easily distracted.

For last six month i am taking ADD medicines, and it helped a lot. I am also taking CELEXA for GAD sysmptoms. Your case could be same. Ask your Doc about ADD and Anxiety symptoms.