Dealing with frequent PVCs and anxiety

I've been dealing with PVCs much more frequently than I am used to for the last few months... been checked out, did an echo and a holter monitor and have been told they are benign... but they are still pretty scary when they happen more often... I have been up to 1 or 2 every 30 seconds at my peak, and it really gets my anxiety going and then I think I am just creating a self feeding cycle where the anxiety causes more PVCs... How often do you all experience them and in what frequency? Any suggestions for slowing or stopping them? I've started 250 mg of magnesium a day but haven't noticed a huge difference. My doctor has also suggested upping my Metoprolol from 50 a day to 50 in the am and 25 in the evening.