She may need the comfort of you, or your immune system to be close, or she may be in a growth spurt, or she may need to tell your body to produce more milk. There's numerous reasons she might need you and not a paci. Pacifiers are substitutes for you :) I know it gets rough being attached all the time but it will get better once her need is met.

you can keep trying to offer a paci or if she seems asleep slowly unlatch ..my daughter wont take a paci so I'm a human pacifiar for her