i need help urgently

my daughter is almost two and I have a five week old son.. she was in such a good return before I brang him home, slept all the way through and sometimes only woke the once. well I'm getting no rest at all, she is waking up constantly wanting to be in our room, in our bed and I'm just so exhausted, icant remember the last time I felt my partner cuddle me in bed, its getrif ridiculous and she will not listen to me, what can I do any ideas to help with her anxiety and separation issues x