sleeping and breastfeeding

Hayden
Are you are keeping your newborn in a schedule? It's seeming to be very difficult to get my not even 3 week old on one at all. I'm breastfeeding on demand and she very much dislikes being by herself. 
She pretty much wakes every hour to 2 hours at night but will sleep in longer stretches during the day. She also seems to spit up quite a bit,...like every time she eats. 
Any suggestions?