That's what I would guess, too, although the pain seems to be a bit more diffuse now. I iced it last night. I really can't do NSAIDs, they hurt my stomach horribly, but it's not searing pain or anything. Trying not to say too much to DH, who will order me to not do anything that will make me ruin my trip!
Today's a rest day, so I might do some yoga/stretching or take a light walk. Walking seems to help, even though it's still there, it makes it feel better, if that makes sense.
OK, off to do pre-trip laundry and other stuff before I actually go to work.