Re: behind my heart
You certainly can't let it go, follow up on this. As for having it removed from your lung, that is a specialist decision (and then ultimately -your decision). You may also inquire about a second opinion and then decide, just be careful to not let this drag out as it does make sense that it could be effecting your heart. On a good note, they referred you to a pulmonary doctor.. if they thought it was cancer I 'think' they would have referred you straight to an oncologist (cancer dr).
Best of luck!!