leads to changes in the body metabolism
as well as the function of the vital organs. Pumping of the heart is increased in order to cope up with the situation and this sometimes leads to pulmonary hypertension
, which subsides after delivery. You had experienced palpitation
associated with breathlessness, which may have been caused by a similar condition. You have done the right thing, i.e., lying to the side. Though it is not so serious, if you repeatedly experience this, you should see a cardiologist in association with your gynecologist to exclude any pathology and take further treatment. Good luck.