Ya know I have anxiety for 13 years and I got so many heart test done and they are always normal from this day I still get chest pains it feels sore sometimes. I go to my cardiologist and they tell me it's normal. The doctor is the only who could tell you it's anxiety. If you are concern again like I always am go back and get checked. I did so many times and Im fine but as soon I feel that way again I go back. My cardiologist told me the reason why I feel sore cause my muscles tense up so much. Press on your chest and if it hurts when you press on it it's muscles. I can't say if it's anxiety or not.
years ago when I started having panic attacks & some PVCs, I would have chest pain. It was esophugus & chest wall spams. Ativan worked the best at that time to relax the muscles. Everytime I'd get ready to go somewhere and get anxiety about it, that would happen & the heart would race too and it felt awful. They did EKGs, echo, etc... and could only discover a slight Mitral Valve Prolapse. They said that could irritate it, but they were pretty sure it was just plain oh' stress & panic. Sure enough, when I learned to breathe deep and take a piece of Ativan when needed, that stuff stopped. If your heart continues to race out of control, you might want to try a mild beta blocker. I use Sectral (acebutolol) and never had side effects with it, but you'd need a very mild dose. Exercise to the level you feel comfortable will work off alot of muscle tightness & anxiety/adrenalin too.
If this continues, read books on panic to help yourself and perhaps even a therapist that specializes in panic attacks. Don't forget to lay off all caffeine, and most sugar.,,etc..I was drinking Dr Pepper when mine started.