this baby is not going to be the same as your other children. dont expect her to be. thats unfair to her....
she has different, and stronger needs than her brother, and thats FINE. you have to understand that.
heres the other thing. you have to trust YOUR instincts. i know the cry it out method is popular, and it seems to work, but it works out of depression that "no one is going to respond to me so why cry" instead of what you mean it to work like. this breaks down the parent-child bonds. i dont think this is what you intend.
my son did not sleep through the night until 15 months, then it wasnt consistent, in fact it was still pretty rare until around 17-18 months. now he will sleep in his bed every night until early morning - between 6-7. he has never cried it out, and as a result, his crib isnt a scary, lonely place to be. he never fusses at nap or bed time, i just do prayer, we have a vacuum cd playing, and he is in his crib and goes to sleep. he has a few books in bed with him, and he sometimes will look at them before he lays down, but hes quiet, peaceful and calm. when he wakes up, he usually just says mama or dada and someone goes and gets him.
i cant tell you how exhausting it is. you know. no one says parenting will be easy, or that you will ever get rest again. this will last the rest of your life, you will always be up nights thinking about your kids, when they are grown, you will be wondering what they are doing if they are safe, etc. sleep is never going to be the same. its nice that you had an easy sleeper in your son, but its (obviously) highly unlikely that your daughter will "match" that trait. relax, and go with the flow. if you force her into something that shes not ready for (sleeping alone) she is going to rebel. i guess how you react depends on what you want her to learn and how you want her to take the next step forward. parenting is 24/7 - that means you lose sleep. so what? youve got great kids :D or, you have kids at all! they are healthy, smart, fun, inventive, and they are the future! :D thats the payoff. so what if you dont get all the sleep you're used to? this time is so short, so precious (you probably hear this all the time) and before you know it shes gonna be going to school, growing up, being a teen and not wanting to have anything to do with you (sigh - teens) and graduating and going to college. it happens so fast. take the time now to nurture their needs and wants and feelings most of all.
i understand that its hard to sleep with a child, there are alternatives. my son still sleeps in his crib in our room. yeah, so many parents might say its a no no, but you know what ? we all get sleep. and its good sleep. theres no worrying if hes ok in the other room, and when he wakes up we hear him right away and he goes back to sleep easier. when they are awake for a while, nad have to scream before you get to them, they are going to take a long long time before they can get back to sleep because they are all worked up.
also consider teething. teething pain is aweful, especially with molars is most kids, giving tylenol or something for teething pain might help sleep be more consistent. check with your doctor about a dairy allergy. (VERY common these days - dairy is not good for humans, no matter what the money grabbin milk industry wants you to think). check for other discomforts such as tags, heat, cold, strange noises, too dark, too bright, too quiet, too loud, etc etc. im sure you have probably thought of all that before, but just reminding...
and again, theres nothing wrong with going against the grain, ESPECIALLY when you know thats what your heart wants you to do. nursing, holding, carrying, no crying it out, cosleeping, those are all things i struggled constantly with people telling me to do things differently. my heart told me otherwise. my son is so happy and confident compared with other kids his age. if most parents are using cry it out, and most kids are having troubles sleeping one way or the other, or having trouble trusting their parents... that should tell us that it isnt working! its really about their whole life. what you do now affects the way they think about the world! if parents are responsive, loving, kind, respectful, accomodating, on and on, then children wouldnt think of the world as such an aweful place (and therefore, if you are Christian, they wont think God is a horribly vengeful person either...)
just love.
do what your instincts and heart tell you.
thats what matters most. at this age, yes she can cry a little. but all night 2 hr screamfests? shes trying to tell you something else is up. somethings bothering her. if that means she gets her best sleep with you for now, so be it. maybe try a matress on the floor in your room, or her crib in your room.... something. crying it out isnt the answer....
www.askdrsears.com has awesome advice about sleep. mother-supporting. you do what you have to do.... all moms will.... just remember your heart is whats most important. listen to it. i cant say it enough.