I have been dealing with Anxiety Disorder for several months now. I'm on .5 mg Clonazepam (1/2 tablet twice a day) with .25 mg Xanax as "backup". I also take Metoprolol and Lotrel for high blood pressure. I've been through all the cardiac tests (EKG's, 24-hour holter monitor, chest x-rays, blood work, stress test, etc.), all with negative results (no problems). Here's my question, though. Every once in a while, as I lay down to go to sleep, I fell some fluttering sensations in my chest, which I discovered (by taking my pulse) were actually variations in my heart rate (speed up/slow down) as I take a deep breath. Anyone ever notice this? It only hapens sometimes, and it seems to be anxiety related, as I only seem to notice it when I feel a little nervous. I don't feel anything bad (dizziness or pain) when it happens, but it kind of freaks me out a little, and those of us with anxiety don't need much to get us going. Anyone?