Not able to walk due to swelling in spine (tail ) at the end .

My daughter 12 years old and gone for school picnic . IAfter picnic she was three to fourdays was ok but she complain for some pain in right leg. so we have given homly tretment and rub iodex, volini gel and given pain killer during thsi days and suddnly next day she could not stand her own and not able to walk . We have consulted orthopedics he has checked he said that their is no proble you have to show neuro physicial so we consulted. After consulation he has given medicine of pain killer and twanquilizer for five days and he said after five day we will recheck . But after five shw was not able to walk her own. Once agin we have visited neuro physician and he recommanded MRI so we did and showed him he suggested and said that she has swelling in spine at last ( tail ). Now 20 day completed but not able to walk . I request my dotor friends Please advise what to do. Thanks