So every now and then I'll get like a flutter in my chest 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. Last a few minutes sometimes. 30min. 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.