dont drive the car much furthur till you inspect
remove the small metal inspection plate between the gearbox and the motor sump
you may have a loose bolt inside the bell housing
while the inspection plate is off rotate the motor and tighten all the clutch plate bolts
clutch plate may have broken one of the pressure plates --running off the throw out bearing .this would make gear changing difficult
in search type in clutch or Pressure plate
http://auto.howstuffworks.com/
find a image off the web of a clutch plate and that will give you an idea