Pain behind left shoulder with PVCs

I am trying to lose weight that came on suddenly when I hit menopause. I was on a beta blocker for PVCs so my cardiologist took me off to see if it would help me lose the weight. Now I am having frequent bouts of significant PVCs and it hurts behind my left shoulder blade at the same time. This can go on for an hour or more. Laying down or sitting up doesn't matter. No trouble with climbing stairs or anything although the PVCs will start up right after that. Any thoughts that might be helpful? I know that PVCs aren't the biggest deal but it's like nausea....uncomfortable, distracting, worrisome...all the time.