TeAm IllUsIonZ978

Alrite i have a shifting problem it all started yesterday after the car show in providence RI ,when i was leaving the car show i couldn't shift in 1,5,or reverse well i made it home diving on 4th all the way home but the today i went to see wat was wrong with it at first i thought the short shifter might on effected that but i check and made sure it was tightthat was okay,then filled some fluid in im because there a really slow leak .. then startd it up and all gears will work but reverse still doesn't work.And also then when it in gear the shifter can still be moved side to side like its in nuetral?HELP me asap... thanks