S.S.
I know that no one's going to like this answer, but here it goes anyways. Why don't you just let her sleep in your bed with you?
My daughter would not go to sleep without being rocked. Whenever she woke up in the middle of the night she would scream for me to come rock her back to sleep. I was so exhausted I couldn't argue with her. This happened several times a night. Finally, when she was almost 3 yrs. old I got so sick of it I carried her into my room. That was it. She slept with us for the next 4 years. I was finally able to sleep through the night and I never regreted it. I knew she would stop sleeping with us when she was ready and I was right! She got to the point where she was too embarassed to tell her friends she didn't sleep in her own bed. This may sound extreme, but my daughter seemed truly scared to be alone and I feel we did the right thing.