Two year old molars?

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My 2yo has had the most atrocious attitude for the last week. At first I just thought it was a flare up of the terrible twos lol, but she has been saying her teeth hurt... I've been able to feel her 2yo molars under the gums for the last few months, but have just looked in her mouth with my phone torch and I can see that her two bottom 2yo molars haven't broken the gum yet, but they have a couple white spots on them... I'm guessing this means they are starting to try and break the gum?

Any mums with bubs who have their molars yet? Do you think my daughter's are starting to cut? And how long did this last?

Thanks in advance (: