Anxiety has caused me to feel druged

Over the past six months, I have experienced a wierd feeling. I had a panic attack in june of 2000. Right after that I felt very druged or stoned, But I was able to physicaly perform and mentaly perform regular functions, just with this altered sense of reality, I still feel this way. Every thing is clear, but it feels like something is out of place, but I can not put my finger on it. I had been taking paxil, which helped me feel better, but not a whole lot. Also I am very fit, I work out and eat right, perhaps it is a lack of vitamins, or something. Please help me out.