So my son is six months old and the last couple of days he hasn't been eating the same. He's acts…

So my son is six months old and the last couple of days he hasn't been eating the same. He's acts hungry and then he'll take a few gulps and scream. He won't stay latched for very long. I think he's teething too. Sometimes he'll nurse okay and other times he won't. He's exclusively breastfed except we started letting him munch on banana with a mesh pacifier thing.