Heart palpitation at 12 weeks

I have palpitation during 1st tri, and then ngayong 2nd tri meron din minsan. I consulted my OB during my monthly check up as long as wala ka pong nararamdaman na chest pain or shortness of breath its normal lang but if worried ka po everytime magpalpite bilangin niyo daw, magbilang kayo through pulse sa my wrist part. But normal po talaga sya kasi yung heart natin nagpupump double time because we have tiny human inside.