I found the best way to deal with sep anx. is nderstanding where they are coming from. It's a mental dev thing and they really are worred that you have disappeared and aren't coming back. During the day keep them with you all the time and build the trust. If you do leave the room tell them you're going and keep talking all the time so they can hear your voice. At night could you bring the cot closer to your room so you can talk to her during the night. We coslept and Ds didn't have any trouble with sleeping in his own bed but each person is different. Also they do go through a milestone thing around 8-9mths where they pull themselves up in the cot but don't know how to lay back down to sleep so it might help if you guide her with learning how to do that. Good luck