Hi J.,
You've received some great input already. I hope some of it is helping. Here are some additional things to consider:
*Your 10 month old is definitely too young to transition into a "big girl bed." It is impossible to keep her safe if she has the freedom to crawl out of bed during the night.
*Separation anxiety is real and begins to set in for most babies around 9 months...so you can see this current struggle as an indication that your baby is develpmentally on track!
*You and your husband need to decide what YOUR personal goals are for your baby's sleep. Every family has different goals. Defining your goals will help you determine which sleep training method and sleeping arrangement will be best for you. If co-sleeping works for you, that's fine. However, there are some drawbacks to co-sleeping...especially if your goal is to have your baby sleeping in her own bed and able to independently fall asleep. If you begin co-sleeping, you will eventually have to break that habit, too. However, co-sleeping is a workable option for some families.
*Remember that for most babies it only takes 3 nights to create a habit. If you've been getting up with her, or holding her to allow her to sleep for a few nights, you've created a new habit. However, it only takes three nights to create a new habit.
*Introduce a lovey, if you've not already done so.
*Because of separation anxiety, I wouldn't recommend a normal cry it out approach. Instead, I would recommend staying in the room. Go through your routine, put her to bed and then sit near the crib without making eye contact or interacting with her. She will cry and protest, but your presence will communicate that you there, she is fine and she can fall asleep on her own. The first night may take a long time, but the second night will only take half the time...the third night, even less.
*Gradually move your position every other night or so...further away from the crib. In just few days your baby will be able to sleep in her crib just like she did before.
I hope this helps.
A. C.
www.babyyouconsulting.com