So yesterday, I started having sharp sudden excrutiating pains that would come on randomly and be gone within a few seconds. The pains are located in the left and right sides of my middle back area. I think its where my kidneys are. I have also been experiencing some pain in my chest, been feeling lightheaded, somewhat weak, and nauseous. Does anyone know what these symptoms could signal? I am 17 years old. I'm quite scared.