I am 5"10 about 270 (I am trying to lose weight) prior military suffering from PTSD and Osteoporosis (Recently diagnosed). I've never been one to suffer from anxiety, or have panic attacks, until last week some time. It started around bed time, I laid down to get some rest for the evening, all was well, until while I was relaxed, my heart started racing, and I could not sleep. I started to think the worst possible things, such as a heart attack.