you are sooooooo lucky you dont feel the irregular beat please dont worry about it! They would have told you if it was dangerous ! The only thing now is not to obsesses over it or even think about it. Most of us on here feel every little beat that doesn't feel right and freak out. It can ruin your life if you let it !!!! Be powerful and don't give it a second thought!
Apparently, the doctors felt the results were "normal" for your case and therefore, not too concerned. If they had thought anything was serious, I am sure they would have contacted you and had you schedule an appointment for a consultation.
Doctors see so many heart irregularities, that, I suppose to them, things like PVC's etc, are every day occurrences and they think nothing of them.
If you are really worried, I am sure it would be fine to contact the office and tell them your concerns regarding your files.
Hope this helps
Susie