B.F.
Yep, its a stage. There is a reason you said "I quit". You need to quit. She is fed, she is dry, she is demanding. Its time you let her do some working things out on her own. Easy to say, hard to do. She won't break and its not like a few weeks from now when she will be standing in the crib crying and screaming for you to come get her. Stop now before you really regret it. Don't worry we have all quit at some point in this crazy thing called motherhood. I once was up way too long with my first who wouldn't sleep without his "pacifier" (me!). I woke my husband up and he promptly said "What do you want me to do with him?" I said "Teach him to dance, I don't care, I am going to bed!"
Good Luck!
B.