Schedule

So my baby kind of put herself on her own schedule. Sleeping by 830 awake between 4 and 5am and it's been like this for 5 weeks. My in laws are having a little bonfire tonight and drinks and my husband and I want to go. They only live 10 min away. It's almost 8pm here now and I'm feeding the baby but don't want to go out and take her, then come back home around 11pm and then her be wide awake and confused. Don't know what to do or if it'll mess up her schedule..?