I remember my first episode happened when I was in the Army doing office work, shredding paper and other things. That evening I had to go my ambulance to the ER. Another episode happened after working out, spent 8hrs trying to get the heart rate back to normal in the ER. I've tried looking at food by documenting it but nothing has come to light. Episodes have occurred in different seasons. One episode did take place after having an argument. That was the last time. As far as an infectious disease doctor, i've seen my local one. He didn't offer any test outside some blood work. He never could pin point anything in the office. Plus i've had an MRI on the brain, echo, allergy doctor, gastro doctor, chest xray, ct scan, blood works by the dozens. ultrasound. All come back negative. That's why I was leaning towards mental health because I read somewhere that certain cases it can raise your temperature.