I'm in between a rock and a hard place because I'm not certain what is going on. First off, back in January of this year I started having an irregular heart beat and so had the ECG done and it showed up I was skipping a beat. (so..no biggy my Mom has the same problem) This past Sunday my left arm had such a achy pain I had to literally squeeze it to help relieve. (this lastest 2 hours straight and did not let up) And then finally Yesterday I was swimming and was in the pool no more then 10 minutes when I started to have chest pain followed by shortness of breath. What could cause these problems? Any help would be wonderful!