Left arm pain with neck, upper back pain, and minimal chest discomfort can sometimes be signs of a heart-related issue, but they are not always due to a heart attack. Since your symptoms have lasted for 5 days and include chest discomfort, it is important to seek urgent evaluation by a cardiologist to rule out any serious heart conditions.

• These symptoms can be caused by heart problems such as angina or a heart attack, but they can also result from musculoskeletal issues or nerve irritation.
• Immediate medical assessment including an electrocardiogram (ECG) and possibly blood tests is needed to clarify the cause.
• If you experience worsening chest pain, shortness of breath, sweating, nausea, or fainting, call emergency services immediately.

Please consult a cardiologist promptly to ensure your symptoms are properly evaluated and managed. If you want, I can explain more about how heart-related pain typically presents.To narrow down potential causes, we will need some more information.I understand you're concerned about possible heart attack symptoms. To help me assess your situation better, could you please provide your age and gender?