my DD is almost 4 months old and for the last 2 or so weeks she has been grizzling NON STOP!!!! even after she wakes up from a good sleep, i put her down to play on the mat and within minutes she will grizzle and grizzle and grizzle until i either play with her or put her somewhere else but then she will start to grizzle within minutes again. sometimes the grizzling turns into crying, other times i just have to be constantly doing things with her. it is very frustrating? why do you think this would be happening?