Ouch! i think i cracked my rib?

hey everyone. so i was snowboarding on thursdsy and i decided to try and hit a jump. well the first 3 times i just fell on my , no biggie. but the 4th time i totally ate in. my head biunced off the ground and everything. as soon as i hit my ribs felt broken. my dad then told me that if they were broken or cracked i would not be able to walk. now he is no doctor so i dont listen to him. on friday morning it hurt really bad for me to sit up. i mean this is a horrible pain. i thought it would be bruised and i am pretty sure the one side is. but the other side is really bad. when i touch it it is a sharp pain. it hurts to sit on the couch unless there is a pillow behind my back. i cant twist my upper body and it hurts to cough luagh or sneeze. i also just relized that when i touch it it feels like it moves. now i have a dance competition in dance. should i still dance with this? i do highland. also could it be cracked or broken,is it true that you cant walk if it was crakced or broken