Baaaaadd Foot Pain! :/?

last night it was our senior prom and we all went to town after and my mate stood on the pinky side of my foot right on the bone! i was so drunk at the time and it still KILLED and now i can walk on it with some pain, but if anyone touches it, it's agony, i doubt it's broken because i can walk on it, but its right on the middle of the bone not near a joint? anyone know what i've done?