Hello, thank you for using HCM. I carefully read your question and I completely understand your concern. But don t worry every think is going to be all right soon. As you describe, you have a history of anemia and your hemoglobin levels are still down. It is quite known in cardiology that anemia could be the reason of this symptoms. It causes you fatigue and shortness of breath. We expect that a person with anemia might be tired, might feel fatigue in small efforts, because of low levels of hemoglobin. All sow with a compensatory mechanism, our body increases the heart rate causing what we call reflector tachycardia. Your heart beats rises over your normal daily limits making you to experience this palpitations and shortness of breath. It is essential now to correct your hemoglobin levels, consulting with a hematologist for the appropriate treatment. During this time, if I was your treating doctor I will recommend a simple cardiac chek up with a electrocardiogram and an electrocardiography. May bee a holter monitoring to see your rhythm tendency. All this for a simple chek up even if in my opinion as cardiologist is that anemia is the reason of your symptoms. So it is essential to correct your anemia because it may interfere even in cardiac examinations. I hope I was helpful. Continue your battle a little wile and every think will be ok. Wish you good health