mystery toe

it was a little sore yesterday but i thought that was from a blister and no big deal- this morning when i woke up the first toe on my left foot is swollen stiff - it is huge and the swelling is all across the top of the foot - tonight i cant walk but have to hobble - fuck - otherwise i am feeling great and i was really looking forward to the 10k run but it is right out of the question unless a whole lot of swelling disappears over night - where did it fucking come from?