I'm really worried because I've been having pain in my left chest every day for the past 10 months. I've done about 20 ECGs, a 2D echo, and a TMT test a month ago, all of which came back normal. The high sensitivity troponin test was normal, and so were my chest X-ray, random blood sugar, and CBC tests. I've been to the cardiologist three times, and he keeps saying it's not a heart issue, but the pain in my left chest, left hand, and upper left back is still there. I'm scared it might be a heart attack. What other tests should I consider, and which type of doctor should I see next?

Since the cardiac evaluations have come back normal and your cardiologist has ruled out any heart-related issues, the persistent left chest pain could be due to musculoskeletal problems or other non-cardiac causes. I would recommend consulting a Rheumatologist to evaluate for conditions such as costochondritis or fibromyalgia. Additionally, you may consider getting a CT scan or MRI of the chest to further investigate any potential structural issues. In the meantime, you can take over-the-counter pain relievers like Acetaminophen (Tylenol) for symptomatic relief.