Sayang, please go see your doctor or pergi ke clinic/hospital sekarang okay, especially if this is new or it's making you dizzy or shorting of breath. Heart palpitations in pregnancy boleh be normal sometimes, tapi better safe than sorry lah. A few of us went through this during pregnancy and our docs checked us straightaway, turned out okay but we felt so much better after getting cleared. Don't worry, tapi jangan delay ye. Let us know how you go!