Re: Suddenly sore
they come in waves, for most kids. and yes, the latch can get horrible while they're coming - exactly what you described - tighter or harsher. for me, like newborn latch-on pain. like they're getting counterpressure against their gums.
it is not fun but it does pass. not very fast in my case ... i thought molars would come in june and they just finished last week. so it passes eventually!
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.