I am 22 years old female. I have noticed palpitations in my heart. I get chest pain and shortness of breath while walking too fast. Jogging and running are something nearly impossible tasks to do. Taking a deep breath is too hard for me. I used to suffer from extreme anxiety and panic attacks, which has reduced now. I find breathing hard even while I'm calm and meditating. My chest and heart feels overwhelmed when I try to breathe.