Starting a week and a half ago or so, I started experiencing fairly severe pain on my belt line. After 3 or so days, it went away, and I actually ran a marathon 6 days ago. Yesterday it came back, but worse and also includes pain lower, down to the left testicle. Though in excellent shape, I often notice shortness of breath after climbing stairs. It resembles the feeling of having to use the restroom, but that is not the case, unless there is blockage of some sort I don t realize. I expect this is some sort of hernia? Being a serious hypochondriac, I assume I am over reacting and this could be a pulled Mussle of some sort. Thoughts?