S.W.
You might like the book "The No-Cry Sleep Solutio" by Elizabeth Pantley. "NIghttime Parenting" by Dr. William Sears is also useful. You could borow either of these books for free from your local La Leche League group (find yours at www.llli.org) and the ladies at a LLL meeting can undoubtedly give you some gentle ideas besdes "cry it out." I highly recommend contacting La Leche League--all services are free and people are nice.
Can you nurse laying down next to her so you can doze, too, and then move her later if you need to? My first two babies were like yours and I finally decided me getting enough sleep so I didn't feel mad all the time was more important than anyone's perception of what was "proper" sleep etiquette. . . they sleep in their own beds now, so I can assure you that this is a season and it will pass... Hang in there!