For some time now my 14 month old dd has starting having melt-downs when she screams and rolls around on the floor borne out of frustration. A new development over the last few weeks though - emitting ear-splitting shrieks that last about 3 seconds, repeatedly... and I do mean, repeatedly. I have tried to ignore the shrieks - there is nothing in particular that is causing frustration - its not that she's reaching for something, or asking for something or whatever, so I'm trying to ignore as I was thinking she was doing it to get a reaction from me. Sometimes I get so frustrated with this that I hear myself shouting "Enough!" or "No - that is naughty!" - still no effect. Dd doesn't seem to understand "No" very well anyway. It is driving me insane. Any thoughts? thanks!