Perhaps she's telling you that she's not ready, or able, to soothe herself without her pacifier. Although I would rarely advise a parent to back track, I'm wondering if this isn't an exception to that rule. Give her pacifier back and see if her sleep patterns return to normal.
I was never in any rush to break my sons of their pacifier. By 2-3, we were down to naps and bedtime only. With my youngest, by the time he was 3, it was bedtime only and we'd simply put it on the end table part of his crib/dresser combo. He'd stand up, suck on it for about 10 seconds, lie down and go right to sleep. If he woke up in the middle of the night, he'd stand up, suck for another ten seconds and go right back to sleep. (We would hear this over the monitor because the monitor was right by the pacifier.) It was truly the most bizarre thing I'd ever witnessed. With both my kids, they gave it up on their own by 4. At 12 and 16, they continue to be excellent sleepers.
I'm sure you had a good reason for your 2 year/end the pacifier decision but, in light of the lack of sleep and all the attendant issues that go with that, it may be worth reconsidering that decision.
Good luck.