HELP! What is wrong with my ankle?

Today I was at my friends house and we went down to the creak behind her house. And I didnt see this walk when i was walking. And my my ankle like kicked it like really really hard. My ankle bone. And now it really really hurts and is swollen and sticks out. What do u think is wrong with it? Im going to the beach tomorrow. And i need to know if it will be better by then. Should i wear my brace?