My Sims Are Stuck!

Used the testingcheatsenabled true cheat, worked great..i got extra lifetime happiness points and made my sims constantly happy but about 20 min later they have just stopped everything..they are just standing staring intpo space,not moving and wont respond to anything. have tried everything i can think of! time is still running so its not the game thats froze everyone else in the town is fine its just my 3 sims! :s any ideas??