For the past 6 weeks my heart will suddenly race and I have shortness of breath most of the time. Today, my heart starting racing and wouldn't stop and then i got this tingling in the back of my skull and had a major issue with breathing. It lasted about 20 minutes and then i had an issue with concentration and was exhausted to the point of not being able to move.
My heart has been tested (wore a holter monitor) and shows a rapid heartbeat, but otherwise fine. All this started a year ago when I went from being healthy to everything shutting down in my body and they thought it was my thyroid, vitamin d and diet. I changed my diet, started exercising, dropped 40 pounds and quit smoking (for a year now); any suggestions on what to do next? Not sure my regular doc has a clue at this point