How long...?

Be

Does anyone know how long it takes for the milk protein to leave your system after a "slip up"? I know it takes 2-3 weeks initially but after an accidental reintroduction (hubby bought chicken salad that apparently had sour cream in it & neither of us checked, just assumed it would only have mayo. 🤦‍♀️), is it still 2-3 weeks?! I can't find any info on reintroduction, only on initially clearing your system. I feel so bad for my little gassy girl.