J.P.
Maybe a little alone time might help. Just the 2 of you at a park for a little while, or whatever it was that you used to "do" together. Remember, she had you all to herself before the baby. Maybe she just needs a little of that again. Babies take alot of our focus.If you look at it from her point of view- everything you do or say right now may be all about the baby. "We can't do this because the baby needs a nap." We can't go there because I need to feed the baby." In her mind all she may be hearing is "the baby, the baby, the baby." Maybe you could also make babies nap time your alone time w/ your daughter for book reading or cuddling.-? You may have to let the dishes or laundry go for awhile. Sounds like she's just craving that alone with mommy time again.
Good luck.