Help... this baby sleep thing is confusing.

My baby girl is a month old. From the beginning she's been a great sleeper. First week home, 4 hrs at a time...np!

All day long she falls asleep in the newborn lounger boppy next to us in the couch, in my arms, in the swing, and in the pack and play. We keep the noise level and light levels the same and she's she's fast asleep nothin wakes her, dogs barking, blenders, tv etc...

At night I nurse her, and put her in the bassinet (halo) next to me. But she screamssss. My mil suggested letting her cry it out for 20 mins or do. It's brutal 😭.

Lately she's ended up in bed with us because of nursing and because it's difficult to put her back in the halo. Although intake precautions, it still scares me, I can't sleep right because I cantand don't want to roll over, we need to break this habit.

Summarize: night time sleep bad, daytime sleep good.

Any suggestions?? I'll answer any related questions.

Edit: I just want to clarify that even though my mil suggested 20 mins, I never did it for that long. I tried letting her cry it out and it only lasted 10 mins and I had to pick her up and only did it once. That's why I'm asking what else works for you guys.