Same type of symptoms for me. Started after a bicep surgery and general anesthesia/ventilator. That was 7 weeks ago and I’ve been in terrible shape since. Can’t work, can’t provide for my family, can’t socialize or function. Just trying to survive every minute of the day and make it through to the next cycle starting at 3AM. My symptoms are exactly the same except oddly my heart rate stays low or actually drops during the adrenaline attacks. In fact, my heart resting rate has plummeted since the surgery from mid 70s before to mid 50s (even into the 40s) now. I’ve also dropped more than 35lbs since the surgery 7 weeks ago despite eating. Somewhere someone has been diagnosed with whatever is afflicting us. It is 100% physical and not at all anxiety. The docs have not been able to figure it out. I guess we are in limbo until someone somewhere stumbles upon this forum and shares a diagnosis. Im sure like many of you, I just don’t feel like this is much of a life and it sure isn’t worth going on like this indefinitely. It is a pretty hopeless feeling.