You poor thing! I feel your pain. I agree with Kelli's advice. As soon as I got comfortable with my son's schedule, which was only for a week, he would change. Most nights, and days, I would spend in a complete daze with the baby either strapped to my chest, or holding him in the rocking chair at night. He did have reflux and medicine definitely helped, but he didn't want to lay down by himself! The doctors would blame growth spurts among other things and I was beside myself for lack of sleep.
Finally, when he was about three months old, I was spent. I was so physically exhausted that I came into his room one night at some crazy hour after hearing his screams, checked to make sure he was dry, made sure he wasn't hungry and after that, I kissed him and laid him back down. I just couldn't hold him anymore! I was afraid that I would fall asleep and drop or hurt him. So he screamed for over two and a half hours and finally went to sleep! The next couple of nights were like that but after a week or so, he was finally capable of comforting himself.
You daughter could just be used to you coming in to hold her, or she could be going through an uncomfortable time like a growth spurt or a little gas. You are the best judge of what to do and don't feel guilty (like I did) if you just can't physically hold her all night long. The best advice I got in my prenatal classes was when the nurse said that no baby has ever died of crying.
Don't try to do it all and don't feel bad if you can't. Your baby will still grow into a healthy, happy, well adjusted little girl because it sounds like her mom loves her very much.