If baby has no other health issue( cold, ear ache,tummy pain etc)this could be a nursing strike.
First step is to do a lot of skin to skin contact with baby.
Next try and latch baby when sleepy.
Keep milk supply going by pumping/hand expressing breastmilk on a regular schedule ( every 3 hours).
Keep baby well fed until ready to come back to breastfeeding.Use your expressed breast milk and pallada to feed.
Next Steps
Buy a good breast pump so that you do not get engorged.
Health Tips
meet a Lactation consultant if you can.