baby only sleeps on chest. helpppp

From 1-2 weeks baby has progressively gotten worse at sleeping.  She used to sleep on her own in her rock n play or pack n play it put to sleep first but now that she's 3 weeks she refuses to be put down at any point and time.  She wakes right up.  She hates her arms swaddled in an will just scream and wiggle until they're free. It then on the off chance she's super asleep and I lay her down she immediately starts flailing her arms and wiggling and wakes herself up.  She'll sleep for hours on my chest but I don't want her to get used to that.  Any advice.  Also I'm talking she doesn't sleep at all alone. Once we lay her down within 5 mins she's up n screaming