So every now and then I'll get like a flutter in my chest almost like a jolt and turns into heart palpitations. Not sure if right word but my heart beats super fast. Can feel it beating out of my chest. Gets to over 200 to 250 bpm. Feel little lightheaded and maybe little achy jaw. Been happening for as long as I can remember prob around 12 years old. Last a few minutes sometimes 30 minutes. Brought it up to my Dr but she didn't seem concerned. But it still sketches me out. Not sure it it like skips a beat here and there it's hard to tell. Any help would be appreciated. Just had an episode at work lasted about an hour of over 200 bpm. Back to resting 60bpm now.