I'm dealing with some chest pain that's been bothering me since January. I've done an ECG, echo, TMT, chest X-ray, and sputum test, and everything came back normal. The pain has decreased a bit since then, but it's still there. Plus, every morning at around 5 am, phlegm comes up, and I notice a bit of a cough when I exercise. Also, my chest starts getting irritated when I sit in an A.C. environment. Could you suggest some precautions or any advice on what might help? I'm really looking for some guidance here.