Mine feels like a fluttering sensation below my sternum slighlty to the left makes me light headed for a second as it kinda travels up my throught,, strange arnt they.. i have had the thud sometimes but it tends to be more when im resting.. Mine seem so different to yours
Mine feels like either a big "thud", or a strange sensation that the heart stops, followed by a "thud" or a weird hard beat, followed by a "thud" or three quick beats in a row, or a "long" heartbeat followed by a "thud" or like some sort of electricity through the chest.
Not easy to conclude from this?
It's really not. The reason is - they can feel completely different, the timing of the premature beat in the heart beat cycle causes the difference. They can feel really weird. But they won't hurt you.