I know this isn't exactly helping you get rid of the dummy but, can you perhaps try a different dummy? Different shaped teat? Maybe a different shape will stay in her mouth.

My DD has always used and still uses a dummy, but has only ever been used for sleep times. It will definitely be harder for us to get rid of at this late development stage (she's 2) but it's worked for us having it. We've been through some rough sleeping patches in her life thus far which resulted in a week at a sleeping program for various reasons.

All I can suggest is stick to your guns, have a plan and stick to the plan and don't vary from it. In hindsight to our experience with our DD having sleeping difficulties for slightly different reasons, it just confused her too much when we tried too many different things to get her to go to sleep. Once we went to Tresillian for a sleep program and we stuck to the one plan rather than trying loads of different stuff, she was sleeping well within a week of being home.

At the same time, it is all trial and error to find what you and your baby feel comfortable with.

Hope you get some rest soon.