Similar thing happened to me, was barefoot in my basement with cement floors and knocked one of those big ass wrench kits off a table, thing had to have weighed like 30 lbs. Somehow it only hurt my long toe right next to the big one. The toe was broken, hurt like hell, and the nail ended up falling off about a week later. During that week there was like 5 different times it just randomly started gushing blood out from under the nail, nasty indeed.
And yeah, i cant believe that there's nothing broken and OP said it doesnt hurt with how badly swolen that is, it looks terrible.