Thanks for the ideas. I used heat last night before bed and right when I got up, and I actually was able to haul myself in to work today. Then one of the nurses I work with suggested I try ibuprofen. (I'd been using Tylenol). The ibuprofen worked really well, so now I'm taking that and just trying to take it easy on my back this evening. I had planned to do a big load of laundry and clean up my apartment, but I guess that's not happening now!