The baby girl often hangs on her breast and then burps a lot and has t…

The baby girl often hangs on her breast and then burps a lot and has tummy pain because she eats too much. The doctor said to do a feeding schedule and feed every two hours. My daughter is such a manipulator, she cries and gets hysterical. I'm thinking if I should give her a pacifier or not? I read that they don't take well to breastfeeding and you already have problems with latching and the cracks haven't gone away yet. And the tummy so as not to worry her even more... Or is it better to just endure this?