4 week old won’t sleep...Help

I’m a first time mom, she’s a preemie born at 33 weeks 5 days. Today is day 5 since she’s been home and out of NICU...she was doing great in NiCU and was on a 3 hour feeding schedule and tonight she just doesn’t want to sleep... soo took her out her bassinet and she’s now sleep on my chest.

I don’t want to get her in this habit. What do I do?

She’s trying to breast feed- I do then she pulls away, then I gave her bottle then she does t drink it all, spits out her pacifier

I changed her burped her

Don’t know what’s wrong