Lower Back Pain

I'm being a lamo. Here it is Saturday night and I've decided to stay home. I was supposed to go to this party being hosted by these French people but I'm taking a pass. Why? In my quest to get in shape, I've managed to reactivate an old injury. Specifically, I'm having pain in my lower back again. So I think I should stay off my feet tonight. But I really want to go. According to evite responses, there are slated to be around 60 people at this Valentine Pink Party. I’ll just have to see how I feel in a few hours….I know this party won’t end until around 4ish so I’ve got time.