suggestions needed

Am

ok....daughter is 1 month old. won't sleep on her own at night, only if I hold her. (will sleep fine during the day). refuses to sleep at a decent hour at night (even if she's kept awake during the day she'll be up til 12, 1 a.m.). with my son I could give him a bottle at anytime and he'd fall asleep. not this one. I'm at my wits ends. any suggestions at all would be appreciated