"sell by" vs "use by" date

Soooooo just had a yummy cup of frothed milk with protein powder. Went to put the milk back in the fridge and noticed it said "sell by march 23" on it. It smelled fine. Looked fine. Tasted fine. Am I going to regret this in a few hours?

Also, should I have some toast. Toast always sounds so good at 9:30 at night for some reason. Toast and almond butter. Yummmm.... Then again, if I'm going to be dyeing shortly from spoiled-milk-consumption-disease maybe it's best I don't have anything else.


Whadaya think?

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