Milk past the expiration date

[Sponger15SB]

So two days ago I come home from picking up my breakfast at pita pit like usual, and I pull out a 1/2 gallon of milk from my mini fridge that had been sitting in the living room for a while cause it stored beer for our party and that I had just moved back into my room last night.

Anyways, I take a drink and I think to myself....hmmm that tastes a little weird, oh well, its probably just because its a little too cold because I set the temp a little lower last night, I'll set it back right now....

Ok so I do that, take another sip of it and realize it probably wasnt the temp, and something is for sure wrong.

So I look at the expiration date: FEB 7th

AHHHHHH!!!!!!!

Anyone ever do this?