How do i know if i shattered my knuckle?

Well i was REALLY pissed at me ex boyfriend for asking out my best friend 2 minutes after he dumped me so i went into the bathroom and punched the cinder block wall 5 or 6 times. my knuckles are all swollen and bruised. It doesn't hurt unless i straighten or bend my fingers into a fist. Its mainly my smallest finger because of the way i punch. Every time i poke it it hurts like hell and i can feel something moving. Is it shattered? cuz i dont think its broken really and idk how much it would cost for x-rays. im only 14 sooo idk what to do please help.