Crying newborn can’t sleep at night

Hi! My 10 day old LO zzzz a lot in the day but when it’s past midnight till 3-4am she will look uncomfortable and cries quite a bit. It looks like her tummy hurts cos it looked slightly bloated. She hasn’t been drinking formula milk (used to top up with Dumex Dulac). Since ysd she has been on expressed breast milk. She doesn’t latch very well and gets frustrated ? Anyone has similar experience? I wonder if my EBM makes her feel sick.