I have a sharp sharp shooting pain, my lower back, right side, it hurts to breathe in deep, especially if I have to sneeze. It hurts to lie on my back on the right side, its bearable laying on left side and the pain subsides if Im laying down on my knees, arms flat in front.. This pain has happened on the lower left side prior and has often coincided with menstruation but I haven't had that since October 4th. I thought maybe I pulled my back from lifting heavy equipment up and down stairs but this is different pain and has turned into flu like symptoms. Thoughts?