For the past week I’ve been experiencing a sensation of a pounding heart. It lasts all day, and along with it I get a feeling of weakness flooding my body. It almost feels similar to a panic attack but lasts 24/7. It’s also been causing me to jerk awake at night gasping. I’m only 21 and have had an EKG and holter monitor 2 years ago and things were normal. But I’ve never felt this way before for so long and it’s seriously scaring me