Heart pvcs after exercise!?

I am 27. I have been checked yo with my cardiologist so many times. I have had a ekg, echocardiogram, and nuclear stress test. Also blood work. Only thing that came back was I have a bit of high cholesterol but nothing crazy. My cardiologist says my heart is fine. I just have frequent pvcs. They are random when I get them. Usually I will wake up one day and get them or when I’m just sitting I will feel them. They last from a couple hours to a whole week. Just depends. But Now they come after exercise more. My question is are pvcs after exercise common in people who have pvcs? My doctor tells me not to worry as for my pvcs are benign. Yet I just feel worried. Any input would be appreciated.