Hi there,

I am a 20 year old male, average weight. A few days ago, I suddenly developed slight heart palpitations one afternoon, and they have not gone away since then. My chest feels tight constantly, and I feel very weak, detached and unreal. My eyes feel quite heavy all the time, too.
I don't know if it's related, but the top corner of my left eye has been twitching a bit as well (though not for the last 2 days).

Initially I thought it may have been caused by my caffeine intake, which has been perhaps a bit higher than it ought to have been. I completely stopped drinking coffee, though there is no improvement at all.

Any advice would be appreciated.