Is my finger fractured?

i was skateboarding very fast and i did an ollie and fell on the middle of the street. my middle, ring, and pinky fingers bent all the way backwards when i was trying to give myself a soft landing. i didnt feel anything at first and when i got home, the pain kept getting worse and worse. and now my pinky is pretty swolen and the other two arent as bad. i can barely move them and when i do pain shoots down to my knucles. and i cant put my hand in a fist nor can i bend my fingers backwards (which i can easily do with my other hand) when i put pressure on it (to type) it hurts. are they fractured?