Burning pain between shoulder blades and a little lower?

Ok, In may 2010 i was in a car accident. i fell asleep at the wheel and hit a telephone pole. i have a slipped disk in my neck and one bulging in my back. I had to move some stuff out of a 2nd floor apt and my hand truck was broken so i just he hawd it. since then i have had this bad pain between my shoulder blades. only hurts bad when i sit up straight, if i lean forward it minimizes it. also i have muscle spams or twitches in my back. are these relates and what should i do.