I've been having some pretty intense heart palpitations, sometimes around 130 bpm, which really worried me. Our family doctor suggested I get admitted just to keep an eye on it. I ended up having four ECGs and a 2D echo, and thankfully, everything came back normal. Despite that, I still sometimes feel those palpitations. Is this something I should be really worried about? Also, I've been feeling some pain near my left shoulder blade and the left side of my chest just below the shoulder. Could these be connected?