This hasn't happened in a long time

For some reason, I got up just after midnight, and couldn't go back to sleep for over an hour and half. Perhaps that was the beginning of my lower back troubles. But when I can't sleep like that, I toss and turn and stretch my legs in all sorts of terrible angles. So when I was up at 6:00 AM, I had a huge knot in my lower left back.

So I spent the rest of the day between ice packs and the heating pad. I still can't sit up without shooting pain down my left leg. When I lie on my couch, the knot is uncomfortable on my hip. But I don't want to be in bed all day (besides, I have no TV connection in my bedroom).