Lord, have mercy!
George! I have the same thing! It started on the 4th of July....my heart felt like it was flip flopping...this lasted for almost 10 hours! It was Sunday, and I took side streets instead of the freeway to work....because I almost passed out 4 or 5 times.
Went to doctor, she told me not to worry about it. Did an EKG...found nothing.
It happened again a few months later. Went to cardiologist this time. Since it had stopped by the time he saw me...they couldn't find anything wrong. Did a battery of tests - ultrasounds, MRI's, heart monitor... Nothing. The heart monitor required me to "press" the button if I felt something....but, I didn't.
Happened again a few weeks ago. I called his office because he said to come in for EKG. It lasts for 10 hours usually. Nurse said she couldn't fit me until 2 p.m. I told her it would stop before than...I called a number of times...but, no. It stopped at 1:30...and just wasted my time and money at 2 p.m.
That's where I sit, as well. No idea when it will hit, nor what causes it.
I do know that I am severely Vitamin D deficient. That was found out at the office health screening of all places. I had it confirmed at a local lab. I know Vitamin D is more important to health than previously thought...so, I am bought a supplement.
It's scary. Next time it happens (which I hope is never) I will head straight for the ER, so they can catch it in action.
Lord, have mercy and hopefully your heart will return to a regular beat.