what have your doctors said about
the supplements? Are they giving you something to control your BP? PVCs are very common, but I can relate to your anxiety. If all your tests came back negative, I would take comfort in that. I would also lay off the caffeine and or get plenty of sleep. I get a sharp pain from time to time on my left side under my breast area when I take a deep breath, have had this for decades. Not to dismiss yours, but mine were not diagnosed as anything serious. If you are having a hard time with taking a full deep breath, maybe you should get a full chest workup. Xray.
Try not to be too nervous. try not to worry. I am very good at both, so I can tell you that it makes PVCs worse. They are a vicious cycle to begin with. You might want to also get your Upper GI checked into.
anyway, my best to you, and keep checking in to the forum.