Sims doing same animation repeatedly

This has happened to me three times now, all the sims around me and including my own sim will be moving in place. The clock does not move and I cannot reset the sims. If I pause the game they continue to move in place bobbing their heads and not doing anything. If I try to save it turns into a infinite saving screen. I am forced to crash the game each time, I am playing un-modded as well.