Babies shouldn't cry for a long while for no reason. She could have wind, teeth pain or discomfort caused by a virsus. Check her temperature, feel her stomach and check her nappy once again. Our son would wake in the night screaming and we could feel his tummy churning. After some Flatulux and/or some fennel tea he would calm down and go back to sleep.

Instead of leaving her crying, try sitting beside the bed and not giving her any attention or eye contact. She will know you are there and won't feel abandoned. Slowly move further away each evening, but still sit in the room. Eventually you will be able to just walk out and shut the door. The first night our son took 15 minutes to calm down. He was standing up, screaming and bouncing in the bed then he just got down and went to sleep.

Our son is now 20 months and we ask him if he wants to go to bed. He gathers his toys and heads straight for the stair gate. He loves bed time because he has his routine of getting changed, milk, teeth brushing and then he says bye byes to everyone. When I had sleep problems with my baby so many people told me that its "all about rountine" and I didn't believe them :-)