Hi
We've often struggled during those development times at our house as well with getting our LO to sleep. Sometimes you just have to ride out the rough patch as best you can :lol:
However, I've got a couple of thoughts.
Firstly, is the paci becoming a problem? If she is waking because she needs help replacing the paci, then the paci has become a prop. In which case you might need to try and wean off the paci.
Have you tried swaddling? We have at times swaddled our DS when he has been having developmental wakings and that has helped (meaning we don't always use a swaddle but do on occasion).
Finally, because DD is falling alseep when you are in the room, but waking again 20 minutes later, it sounds like she is having a jolt which is rewaking her. You could try staying with her a little longer, past the jolt, helping her into a deeper sleep before you leave her.
I can't help with specific advice on PU/PD sorry - if you have questions about it you could try the PU/PD board for help with those.
Good luck!
Jo