Did I just sprain my ankle?

I was being dumb , my lil brother wanted me to play tag with him around the house. Then I twisted my ankle when I stepped on a book case. I moved it funny and heard a large pop, for some reason the pop felt good but it stung really bad. And now like 10min later it really hurts to put pressure on it. And it feels like the left side is thraving and swelling. I hope it's alright. Also up my femur it hurts as well. Should it be fine?