The Other Day While At Work I Dropped A Rather

The other day while at work I dropped a rather heavy toilet seat on my foot. It hurt a little but since then the pain has steadily been getting worse. I can't move my toes without a sharp pain moving through my foot, and although my foot doesn't apear swollen my shoes suddenly seem too tight for it. I can't stand on it for more then five minutes, and today my foot hurt so bad i was shaking, and I thougt I would puke. I don't think it's broken but I am concerned about the pain.