keeping in mind that i work in the medical field and may be overly cautious compared to others, but i think, espeically with your heart, that when something seems out of the ordinary for you, then it is something worth checking out. now it could be here that this isn't far from normal for you but you are paying much closer attention due to the lung nodule than you would have been before. that would be totally normal. but if you think this seems unusual, then it doesn't hurt to get it checked out.