Big Girl Bed Night 1

We put together Liv's new bed last night.  She looks so tiny in a big bed.  Her doctor said she needs to go to sleep without us holding her and that might help her sleep through the night.  So we figured we would put together a twin bed and do the new routine with a new bed.  The nurse said she woke up twice but just to look for her binky.  My husband is worried that she is going to fall off.  Of course it's against the wall and we have a bed rail on the other side, but there's still a gap.  Everything was fine last night so I guess we will just continue to see how she does.  She doesn't understand that if she leans off of the bed or couch, that she will fall off.  I hope she continues to do well with it.