2 good nights then back to square 1

Good morning Moms have a one-month-old at home I’ve been working on her night schedule with sleep and I have been giving her last feeding at 9:45 and then she would sleep until about 130 I would feed her and then she sleep again until 530 so it’s been a lot better but I only got two good days out of it. last night was a disaster she was sleeping until about 130 I fed her then she wouldn’t go back to sleep until 3 o’clock

is this normal ? where there’s just unpredictability in the routine

Where everything can just go to shit lol??

also the past two days when I do her last feeding she starts screaming I am not sure if it’s gas or if she just doesn’t want the bottle