Okay so I've been checked by cardiologist many times and they say my heart is perfect. The thing is I get these heart beats that are slow. I usually get them when I stand up. It feels like something my heart is trying to pump or as if something is trying to stop my heart from pumping. I also feel slow vibrations of my heart squeezing. Doctors say I'm fine. I feel like I can die any moment. What should I do? I'm scared. Plz let me know if. You have any experience with this.