Nipple thrush / pain

Baby is about 3 weeks old. Past few days she has been really fussy when trying to latch. My nipples are cracked. I apply some breast milk on the cracks. When dried it has a layer that is crusty. Is not like the other non cracks area that has dried breast milk. Is it nipple thrush? I’m so scared. I checked my baby’s mouth and it looks fine. Please help advise on what I should do and what it may be.. my nipple hurts…☹️#firsttimemom #advicepls