I understand your fear as you are worrying about your PVCs and your heart. I used to worry about some irregular beats I had, then I had a stress test and a few other tests which came back normal so I let go of the worry.
I know this is not easy but I hope in time you will be able to trust that your Dr. If you continue to worry about the whole in your heart I would kindly suggest making an appointment with a different Cardiologist for a second opinion.
I am posting you a link to another thread that was posted earlier this year that you may find interesting.
Hang in there and keep on talking with us here in the forum. WE are here to listen and support you in anyway we can.