I've had a few this year, it is frightening when you get that weird fluttering in your chest, next thing you can't breath and your heart starts to speed up as you start to panic.
Something must be triggering them, as I think it's more of a subconscious response to something you're trying to cope with.
Have a think, is there any changes, pressures, responsibilities that could be affecting you?
Once you identify what it is you will be able to hopefully find a solution and they will lessen/ stop.
In the meantime if they are a proplem a doc could prescribe you a betablocker to help, hope you feel better soon
