When your little one started growing their molars how long did it take them to cut through? How long were they fuzzy and in pain?

My 14 month old began growing hers and starting 2 nights ago she has become cranky and cry so much when she wants to nurse especially at night but she can't from the pain. She seems to be able to eat fine so I try to make sure she gets full and wont need to nurse and I give her cold things to bite on but when it comes to taking her nap or going to sleep at night she wants to nurse first but can't. I hate that's shes so miserable and I know we just have to wait till the tooth cuts through