I have also gave dummy to my BB since 4 weeks old. I don't want her to be addicted to the dummy, so I will try every means to calm her down, e.g. walk around the house, let her listen to some sounds (e.g. washing machine), play Baby Mozart to her. If cannot, then use the dummy, but for 10 mins. and I will pull it away.
I think this works.
But the bad thing is my maid usually give her the dummy!!!