anyone dairy-free and accidentally ate dairy?

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I am dairy and soy-free in order to EBF my LO due to his intolerance of the proteins. The darn holidays messed us up - both sides of the family know I'm soy and dairy-free, but after feeding me and assuring me the food was ok, at least one has let me know there was a mistake (thought margarine was dairy-free).

Anyway, my LO is back to the fussy/screaming/horrible gas that he had before we figured this all out. He can't sleep at night and just seems miserable on and off throughout the day. I'm not sure I want to know, but I'm wondering how long it will last. I know it can be up to 14 days to clear my system, but anyone else have experience with this?

TIA.

Oh the holidays...