Hi, Pregnancy is a physiologic state of increased stress on a female body. I would like to know if this is the first time you are pregnant? did you have any previous cardiac ailment? If no, then please do get a full standard cardiac checkup like ecg, ECHO from your doctor. Also returning back to your query, your symptoms might indicate onset of a condition named as pregnancy induced hypertension (PIH). It needs regular monitoring from doctor but you can manage fine with medications & the condition gets resolved often after giving birth to child or after termination of pregnancy. Also I think Labetolol might be a better option for your treatment. Do consult your doctor about this drug also. Best wishes