I'd talk to my doc about this. I have the chest pains & shallow breathing & once in awhile I'll go into some kind of a zone where everything seems unreal & I can't comprehend what people are saying or what is happening. It seems like stress can bring on the really bad spells, but the rest of the time it is just free-floating anxiety. I take Klonopin & Trazadone at night to help me sleep. The anxiety at night is really bad. During the day, I can usually "talk myself down"--knowing that it is just anxiety & I'm not having a heart attack or something. Talk to your doc!--Suzy