I don't know if anyone can help me... my 2 yr old has always gone to bed at night with no problems, except for the last couple of weeks. After I put him to bed and leave his room, he proceeds to scream and scream, as if he's terrified. I've tried leaving him to cry for 5 or 10 minutes but he screams out "Mummy, Mummy" over and over, and by the sound of his voice, something is really disturbing him. I've tried leaving his door open to let the light in, and I've also tried putting a night light in his room, to no avail. Apart from any sudden fears he may have developed, I can't think what is causing this. The last couple of nights I have resorted to giving him his dummy to go to sleep, because he just becomes hysterical if I let it go on for too long. (I put him to bed at 8 o'clock tonight and at 9 o'clock he was still awake). He's never needed the dummy to go to sleep before and I certainly don't want it to become a habit now, so I really don't know what to do, because nothing else seems to work. If I thought it was just a whining/overtired cry I would use controlled crying (which worked really well when he was younger), but he sounds terrified and I don't feel I can leave him crying for too long like that. Can anyone think of what to do? I would really appreciate some advice.