I know I have anxiety, here's no question about that. As of late though, more specific it's been about 2 weeks possibly. What happens is at night around 8-10pm my heart will start racing out of no where for no reason which in turn causes me panic basically. Recently I had a friend who was thought to have anxiety for 9 years basically find out that his problem has been SVT and that could be in the back of my head. I've had a stress test about 4 years ago and wore a halter monitor some years back for reasons I can't remember. I took Prozac on and off for years and when I stopped taking it I quit cold turkey a few months back. So I don't know if that could change me chemistry. I could be reaching here and it all just be anxiety, which would be great, but can't escape my negative thoughts. Also when I lay down at night my heart seems to have an altered beat and I find myself waking up from not breathing sometimes.