question: I am a 51-year-old female and a social smoker/drinker.  About a month ago, I started experiencing a sensation of my heart flipping, with an urge to cough.  I have had breast cancer (2002) and radiation treatements where they attempted to not involve my heart or lungs, yet they were unable to avoid them completely.  I have been nauseated as well as lightheaded as well during some of the "flipping" episodes.    I work for a Mayor, who is also an MD (GYN).  Should I have him recommend a specialist?