maybe its 'fight or flight" to 'peter out' ? No worries, that heart thingy ain't gonna kill me, just takes the icing of my life at times. Its only part...the rest I has been going on for 10 years or so. I feel great a lot of times, but then I get just very tiered and feel like my brain is living in a cotton box and everything slows down. Physically, I get aches and pains in my joints and sweat a lot at night...its like having an infection that flares up every once in a while, gets bad, goes away, comes back... Hopefully we will find an answer to it and are able to do something about it. Could be many different things (from food allergies to toxisity, but a doc at least needs to take the time to figure it out.