I think i fractured my toe?

Today i was walking up some stairs and i stubbed my toe REALLY hard. Like really really hard. When Im not moving, just laying in bed, my toe pain is about a 9 on a scale of ten. I can not walk on it, I tried at one point, only walking on my heel, and after about two steps the pain became unbearable. The bottom of the nail turned purple. Should i let this take its course, or should i see a doctor?