hello thank you for posting here. i do understand your concern. chest pain originating from the heart usually comes on exertion like walking running or stress. it is usually behind the breast bone but can vary from person to person and can appear anywhere in the chest or back. if you get chest pain while resting then it is either an unstable angina or NSTEMI (small heart attack). [dont worry i am not daying you had an heart attack]. in addition anemia also causes decreased blood supply to the body organs including the heart. therefore first we must rule out a cardiac cause. first an EKG, Complete blood count, cardiac enzymes test and a 2 d echo should be done. if all these reports come out as normal then you can be relieved. next a treadmill test which requires you to walk on the treadmill while your EKG is continuously monitored is adviced. if this treadmill test is negative, you can stop worrying about heart attack now. treadmill test should be done only after ecg, enzymes and echo in your case. in the meantime you can self examine your breasts for any lump or mass. if you can feel any mass or lump a mammography is adviced. if you still get the pain despite these tests then a short course of NSAIDS like diclofenac can be taken along with antacids-pantoprazole 40 mg twice daily before meals. wishing you good health. thank you