Yes, get the tests! Soreness revealed a lump, an followup testing meant surgery. My daughter came along to be with me, but in the few weeks between the testing and the surgery date, I detoxed my diet from salt, sugar, caffeine, nicotine, alcohol, and was extra careful about rest/exercise.
When the surgeons assistant took the pictures they needed to be accurate, the lump was gone! The doctor, my daughter and I were elated and undone from joy!
Apparently the lump was liquid or one that responds to simple detox in the diet. Many are, and they will go away if the better diet/rest/exercise things are done, but early testing was key, since letting it get worse might have meant a much more serious end to my story.