Again with the twingie

Last night and this morning my back is twingie again but with a twist. Now I have shooting pain from the twingie part of my back down my left leg. After last year where I decided a little back ache wouldn't stop me from working and I was in bed more then a week, I'm taking it easy. Today I'm staying home. Took 2 muscle relaxants, which I should have taken last night before bed,  and going to lie down part of the day. Not sure why it's my left leg. I drive with my right leg...