Are you seeing a electrophysiologist? One thing to realize is stress and worry aggravate PVCs and PACs. Thus trying to find ways to reduce that is important and you should be getting guidance on that.

Did your EP suggest taking Magnesium? A complete blood test will reveal any electrolytes imbalance along with magnesium and potassium (which are important with having PVCs) but mine were normal after blood tests. We moved to a low dose heart rhythm medication. I have chronic PVCs (one about every 10 beats). They get better then worse. I have an ICD/Pacemaker since 2006. I have heart failure with first symptoms caused by a left bundle branch block diagnosis and low EJ over 20 years ago. I do Sprint Triathlons so not stopping me from exercise (all approved and encouraged by me doctors).
Good luck! Try to find ways to reduce stress and occupy your mind away from PVCs.