My child had a massive speach regression, at we think about 18 months. He's always had quite bad constipation since birth, doctors have always fobbed this off but I've cut out dairy a lot and it's massively improved. Anyway, he's getting back to himself lately (6 month later) with actions, clapping, waving. But still no words. He's 23 month now and hasn't said a word since. However he's started doing some babbling again and often says words really quiet like tiny whispers. He whispered "poo" the other day and then had one. Also I've noticed he's started opening his mouth like he's copying whay I'm saying but no noise comes out!