Help!

Jennifer
My daughter is 7 weeks and I'm supposed to go back to work in two days. My problem is she won't go to bed till midnight and then only sleeps 4 hours. It's fine when i can nap with her during the day but IDK what I will do back at work. I've tried the bedtime routine I've tried swaddling. I have done everything short of bed sharing. I need something to work because nothing has.