Random palpitation & heartbeat in throat

Hi, I am a 27 years old IT professional For past two-three months I have been noticing random palpitations. Or sometimes I feel like something is travelling up my throat very fast and then vanishing, the first few times when it happened, I got my ecg done which came out to be normal. But since then I have been feeling palpitations every now and then. Like today, after a week (while I was talking)I felt like something travelled up my throat for a second and then vanished, then I felt my heartbeat louder, I panicked for a while them calmed myself down later. I want to know if this is something serious and should be checked properly? Or is it a normal thing? And what can I do to make it better. Also, as a background I have been suffering from stress and anxiety for past one year and this palpitations used to occur only during anxiety previously but now it also happens when I am doing my regular work. Please suggest.