while working, i laid my chest on a stack of boxes to lift a rather heavy box, now, i have dull chest pain in the xiphoid process area, it has been a few days now, when i eat i get a full feeling after just a small portion of what i would normally eat at a meal, turning/twisting causes pain in my back and a self exam of the xiphoid process, the right side seems firmly attached to the rib cage while the left side there appears to be about a 1/4 to 3/8 gap and the xiphoid appears to be lower on this side