Hi all, I have been for an ECG and bloods test, blood pressure, everything came back fine

I have a burning sensation on the left side of my chest and it radiates into my shoulder/arm and fingers sometimes. you know that feeling when you hold a hot water bottle in one place for too long and it starts tingling/burning? its like that.

So I have a discomfort that ebbs and flows in intensity which isnt cardiac

I am doing IFS therapy and I attempted to ask which part is causing this pain but i've had no response from any part.

im very worried about this