cheery, dont worry, but see your doctor anyway. They might want to do a 24hour trace which is basically a ecg over 24 hours. I had this, it cured my palpitations (the nurse said it happens a lot ). I would also say that the pains are probably nothing to worry about, might be indegestion but best get it checked anyway. Is the pain on exertion? If so, defo get checked ASAP. I had palpitations and its really scary - you tend to notice them more when you are going off to sleep, less distractions. Couldnt bloody miss mine felt like my heart was ready to jump out of my chest.
Nothing medical found wrong with my, i was having lots of Ventricular ectopic beats, so an extra beat and change in rhythm, VERY common, we all probably have had this at time to time. I found out what triggered mine, it was Beconase hayfever spray, oh and night nurse does it too - i think it was the steroids in the spray. Once i stopped using that, it went, now hardly ever get them, well almost never even.
Definately worth getting it checked out as the more you worry the more you notice, then a slight twinge in your chest that you would otherwise ignore will be worrying you sick for no reason.
My DP gets palpitations if he drinks too much caffeine - remember there is lots of caffeine in tea, and coke. Alcohol causes them too, and chocolate - i had to give up all of those things whilst i was waiting to find out what caused mine - i was not a happy bunny