Open Question: Sharp and painful back-ache for 2 days straight!?

Okay, so I started experiencing my back ache Sunday morning when I woke up. I thought I had slept poorly or something and didn't really think much about it...but now its Tuesday and my back pain is worse! Its a sharp pain located on my middle-left side and it really hurts whenever I bend down or even LOOK down. I have also noticed that my left shoulder is MUCH lower than my right shoulder and my body (my upper body) looks slanted, if that makes any sense... I'm not really one to complain about pain, but this really hurts and I have NO idea what it could be! Please help =/ Thank you!