I agree with Remar, this sounds like a typical panic attack. The worrying about your heart is creating a lot of anxiety for you which in turn causes the panic attack. This fear and worry also feeds your anxiety creating a vicious cycle. Look into some professional help as Remar suggested so you can get beyond this. I wish you all the best!
Yes, these are very common symptoms of a panic attack. I would'nt hurt to get a check up just to make sure there's nothing else going on. But this really does sound like a panic attack. Have you been under a lot of stress lately? You might want to think about counseling and possibly meds to take if an attack hits. Going to a counselor can help you find out why your having panic attacks and you can also learn coping skills. We're here for you to help any way we can. Remar