C.C.
I used the BabyWise method and it worked great for me. She's old enough and big enough to sleep through the night! You don't mention what time you're putting her down for bed, but it should be early, like 7pm or even earlier if you can. Believe it or not, she'll sleep better and longer if you do.
Also I found that having a very consistent meal schedule throughout the day helped a lot. Also - surprise - don't nurse her to sleep. If you do, you run the risk that she'll fall asleep before she is really full (so she'll wake up earlier than you want), and worse, she won't learn how to fall asleep by herself. Put her down before she is exhausted, and when she is content but awake. She will learn how to fall asleep on her own (it may take 30+ minutes some nights and that's ok!). Once she has mastered the skill of falling asleep by herself, she will be able to put herself back to sleep in the middle of the night too.
Don't rush to get her if you hear her in the middle of the night. Give her a minute or two - she may settle herself back down. If she is crying a little, she may be crying in her sleep - it will not hurt to let her work it out on her own.
Let her keep the binkie. My youngest had hers until she was 2 and it was not a big deal to break her of it. (She didn't even cry!)
Lastly, if you have not spoken with your doctor about the depression, please do. If you're not on medication, consider it. I suffered terrible PPD with my first child, and was amazed at the huge difference a little Zoloft made. (It is safe while nursing.) Best of luck to you!!