I think it is great that you are seeing a doctor. I am a 34 year old woman who began having palpitations two years ago immediately following the birth of my second child. I felt like an idiot going to the doctor but it was a very good thing that I went because it turns out that I have a pretty serious electrical problem in my heart called long qt syndrome. It is VERY rare and usually you would have other symptoms, although in my case the pvc's were the only symptom. Pvc's are surprisingly common. Many people have hundreds every day. I know how scary pvc's are to live with...it makes me want to jump out of my own skin! Try to distract yourself by watching a funny movie or doing something that will occupy your mind because anxiety definitely makes them worse. Good luck with your tests and let us know how you are doing.