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Thanks so much for requesting me. I am sorry your baby is having trouble.
I know he does not ant you to look but you will have to wrap him in a towel like a burrito with just his head out. Maybe someone can hold him while you look under tongue and on roof for a stuck item, oral sore, bad tooth or ny abnormalities.
It sounds like something in his mouth is hurting him.
Since it has been going on a week it is most likely a bad tooth.
I will stand by while you go check
Have you been able to look in his mouth?