I'd say still feed her. I didn't stop feeding my LO at night till she was about 10 weeks old. I'd wait till at least then. Then you can introduce a paci, or ven pat shush.
What we did is at 10 weeks we gave her a paci for all but one night feeding (around 3am) and then fed her at the 3am wake up, eventually she started sleeping till three, then right through. It may take a bit more work then that for you, I can't say, we were really lucky, my LO is a great night sleeper.