My sister has sometimes shortness of breath and also low blood pressure. Her hemoglobin is 12 gm. ECG report is okk. She also feels weakness and fainting. She is taking medicines since 1 month i. E. oxygen, erection Ls, librium10 mg, lycofit syrup, celtick. What should I do. Should I change the doctor because she is taking medicines since 1 month but there is no improvement.