Welcome! Chest pains are probably my most consistent symptom of panic & anxiety. The vary by degree, but I almost always feel as if I am having a heart attack (my heart is fine - has been checked out, have had attacks for 20+ years since childhood - still ticking away!). It is also the scariest symptom. It can go hand in hand with shortness of breath - barely breathing is my lucky symptom #2.
I also carry stress in my back/shoulders and carry children all day long - this combined has caused pains down my arms/numbness in my extremities and so forth - so sometimes the stress can be leaking down your arm without necessarily a heart condition behind it...obviously, if the chest pain persists, please please see a doctor and have it checked. But, from what you have shared, it is most likely anxiety-related.
You mentioned genetics - my anxiety/panic has a hereditary basis as well (father, uncle, grandparents - busy little family tree of it) - for me, it actually makes me feel relieved. As if I have inherited part of this condition and it is out of my control - nothing is "wrong" with me, per se - it's just a side effect of my ancestors.
Anyway, I hope that you are able to relax - if you have access to any relaxation CD's/exercises, I would try them. I particularly like progressive muscle relaxation. I'm a tense person and it helps me - you can probably download it somewhere.
Keep up posted!
Panic Attacks (since age 10) & General Anxiety with a little OCD thrown in there
Biggest Challenge - Panic; Biggest Joy - my 3 cute kiddos (ages 1, 2 & 5)