@concern
Coming to you with decades of having PVCs and PACs.
First if you don't feel your cardiologist addressed your concerns try to get an appointment with a Electrophysiologist (EP).

Per my EP and heart failure doctor almost all human beings have PVCs. In most cases they are just extra electrical pulses. In other cases there are a sign of cardiovascular disease and or electrical issues in your heart.

One thing you really need to understand is stress can (again per my EP) cause you to have PVCs. So when you start monitoring your pulse and or super sensitive to monitoring your heart you are going to have a lot of stress. Stress affects adrenline and if not expelled (it is the fight or flight hormone) it builds up.

If you had a holter monitor test that is a good test. What it will reveal is where your PVCs are coming from, how often, etc. and the cardiologist can determine if affecting function of the heart enough to prescribe medications or ablation.

If you trust your cardiologist and he/she is expererienced he/she is telling you the holter monitor did not indicate you needed any further treatment. Reducing your stress is going to be very helpful to lowering your PVCs. Ask you doctor about taking magnesium supplements as many studies show can reduce PVCs, and PACs (again per my EP). I am on magnesium. But please just because I am on it does not mean you should so like with any supplements check with your doctors first.

I have had so many PVCs that I take another medication to reduce them and it works. I really don't mind the single ones as I know nothing to worry about and are common. It is those that come in 2s or 3s that bother me. But again until they get to a level where heart function is affected they are very common. Just know if they continue and your cardiologist determines treatment needed there are some great medications out there for this.

For you reducing your stress is just as important to help with PVCs and the stress build up. Just know PVCs are very common and your cardiologist has advised you not to worry. If they persist and you feel they are affecting your ability to do normal functions asked for additional testing or asked to see a EP. An EP is a specialist who deals with electrical issues of your heart.