I've got a 3 litre unopened milk in my fridge that expired yesterday and i just noticed it 🙈. I forgot I had it in there and stupidly bought another one yesterday. I'm usually really good at checking what I have before buying another but this one got away from me as it was tucked at the back of the fridge!

How safe is it to drink and how long for?

I won't be able to finish it for at least a few days but also don't want to get sick.