Is it normal to feel flustered and short of breath all day in early pregnancy?

Early pregnancy all day flustered shortness of breath. If there is no abnormality in the ECG examination, it can be relieved after rest is normal, this is pregnancy reaction, mainly because estrogen and progesterone increase after pregnancy, uterus enlargement caused. If there is abnormal ECG is abnormal, myocardial ischemia may occur.