I ve been having this pain in my chest recently in the lower lateral area, both sides, sometimes feels like far upper abdomen. It comes and goes, but feels like a tightness or pressure. I can t quite tell if it is made worse by breathing, but I do feel like breathing becomes a bit more difficult when the pain starts. It s been going on a few weeks, but hasn t gotten worse , though some times it is worse than others. I ve recently started a healthier diet, but I don t believe that is related. I am 28 with slightly high BP and a history of back issues if that helps.