I'm a 22-year-old guy, and I've been smoking for the past year. I've had this chest pain for about 8 months now. I went to a cardiologist, and my cholesterol was high. He told me to lower it, which I did in a month, but the chest pain is still there. I went through ECG, echo, TMT, and a chest X-ray, and everything came back normal. The cardiologist said my heart's fine, but I still feel this pain. It's worse when I bend forward or take a deep breath, and its around the center and left side of my chest. I'm not sure what to do next. Should I be considering a chest CT scan? The cardiologist told me to just ignore the pain and said its not heart-related. I already quit smoking and changed my diet, but the pain hasn't gone away. What should my next step be?