I'm bf but decided not to use a dummy. One of the reasons was that my friend had a baby 8 weeks before me and when I went to see her in hospital her baby had a dummy in, it just looked really unnatural and weird.
They say that it's best not to put them on dummies etc until bf is well established.
Plus, depending on how long you bf for it can get in the way of their speech a lot and ther teeth can grow around the dummy.
And! My oh was on his dummy until he was six which I think is so gross! lol.
You can sooth them other ways, I know a family friend gave her daughter muslins to chew on and that worked really well!
Hope I've helped!
xx