Chest pain can happen for all sorts of reasons and it's often brought on by smoking because of the vasoconstriction. It's worth looking into. May be nothing, but you never know. If you're having it, you need more than to be hooked up to an EKG, too.

For the record, physicians most assuredly DO care about palpitations. There are all kinds of palpitations, and some of them can be a signal of serious arrhythmias. Please don't speak for what physicians do and don't "give a rat's ass about."