I've had this a couple of times but this time is agony
. I can't think of any knocks, I don't do any exercise that could of done it, I just woke up one morning unable to walk 
I tried to get a doctors appointment today but they can't see me until next Wednesday and I'm hoping it's bloody well gone by then, I've already had to put up with it for a week!
I can't stretch my foot, as in pointing the toes. I can't bend it at the toes, sort of when you are walking heel - toe, I can't do this, I can only walk flat footed. And more than anything, I can't bear wearing any shoes, my lightest slippers are all I can manage without severe pain, socks are a problem too, but more the getting them on part rather than wearing them.
The pain is over the top of my foot, from the ankle down to the big toe. My big toe and ankle are sort of sore but that's not the main problem. Touching anywhere along that line is very painful.
Oh, I should probably mention it's swollen, but not bruised looking (mind you, I rarely bruise)
Please, please tell me what it is
and more to the point, what I can do to make it go away and make sure it doesn't come back.