If you move your ankle in any direction it hurts? Not just one?
I guess, now that I think about it, its mostly if my foot is turned slightly out to the right or when my heal is raised above my toes (like standing on my toes or walking down stairs).
A couple minutes ago, the pain hadn't been all that bad and I forgot to be careful. I dropped something on the floor and when I bent over to pick it up, whatever I did with my foot caused quite a bit of pain that lasted for bout 30 seconds.
Also, I don't think I have IBS right now - but I do have a sore throat - which I doubt is related.
edit: oh, and I took 3 Motrin before going to bed last night. I think they helped because I slept through the night fairly well (except for when I got up to go the bathroom and planted my foot wrong getting out of bed... owww).