Thickened cream, not sour
I bought some pasteurized cream from a local dairy no more than five days ago, and I used half of it to make butter on the day I bought it. The rest of the cream has been in it's original, plastic container since then. When I got it out of the fridge a few minutes ago and tried to pour it, it was super thick... like yogurt thick. It doesn't taste or smell sour, so I can't figure out what happened. Could it be that it is just super cold from being stored in the top of the fridge (where I have occasional freezing problems)? Is that a dumb assumption? Help me SE!