My DD is 12 weeks old today and has been the great up until about 3 days ago. She has started screaming uncontrollably and I have no idea why. I can't seem to get her to calm down. I think she could be teething as she has been dribbling lots and trying to get her hands in her mouth, but also think it is early for teething. My other thought could be that she is having a growth spurt - but would that last this long? She is still sleeping well at night and feeding well, so not sure why she is crying so much. I know it is hard to tell from the few lines I have written, but does anyone have any ideas??