The time to worry about your heart rhythm is when you have a structurally abnormal heart(your heart muscle is weak or too thick, or there is a significant heart valve problem), or you have fainting or lightheaded spells related to the heart, or you have episodes when your heart is beating too fast for several minutes or more at a time. These things should be evaluated by a cardiologist.
Some people continue to be symptomatic, despite reassurance from their doctor that the problem is benign. We do have medicines that can markedly decrease the frequency of these “extra beats”, but as you know, all medicines have potential problems and side effects. So a discussion of risk vs. benefit would be needed before starting one of these medications. If you are really wanting treatment for your heart rhythm issue, it is appropriate to see a cardiologist.