What does it smell like now and how hot was the room? My reaction would be NO WAY but you could make pikelets or something that needs soured milk with it.
I'm with MJ - milk that has been homogenized and pasturized doesn't sour - it spoils. You could probably use it to make yogurt or cheese, if you act quickly.
If it smells and tastes okay I would cook with it - FAST! (Soup would be my first thought if it was a lot, or pudding). Interestingly I've found that store bought chocolate milk seems to hold up better than white milk if it's left out by mistake...