Lower Back Pain Writing This

It started happening yesterday and wasn't as bad as this past night. I was somewhat surprised too because I am a 27 year old guy who keeps active and hasn't had any injuries and such. The worst of it is when I went out to my car, ever so slowly, so I could go to the store for some pain reliever. It was the longest walk to my car ever and I almost made it to the car too. The pain became way too unbearable and unrelenting even when I leaned over something to take the strain off my back. I literally collapsed on the cold ground (didn't help that it was 20 degrees outside). I had no choice but to make my way back to my apartment, on hands and knees and even then it seemed unbearable. Painfully, I made it back to my apartment and began searching on the web for info on this sudden crippling feeling.I just hope your right that acute back pain doesn't last long because I can't miss work. - Shane