has she got a good bed time routine? both ours have, and weve hardly had any problems at night.
when you start a routine it can hard work but once its working you wonder how you ever did without out.
as for the being sick, she knows it provokes a reaction, so leave her be for a while, try leaving the door slightly ajar so you can see her but she can't see you, that way you can monitor the situation without actually running in to her, it seems harsh but works quickly and effectivley, as they realise your not going to run in to the room.