For two days now I have had pain on my lower left side. Not sure if its my rib or not, but there is no bruising or even pain when I touch it. However when I breath in too much, or sneeze, the left side hurts. I looked up my symptoms online and only found pleurisy, but I don't have pain in my chest its the side of my body, near the rib. I am a cashier at a store, so for four hours a day I have been lifting items and bagging them away. So, I don't know its over work or something.