I already did it and it wasn't difficult. Did you use the cheats to level up. If you did, if you have a backup save, use it or you will have to start over. If not, check your quest panel to where you are and what to do (Priti's quest). You have to call Priti in the office by phone call and do the test. Don't skip a day or it will never work.
Don't forget to check classes to refrest your quest