Girls, hi! Can you help me figure out if my milk is okay?

Girls, hi! Can you help me figure out if my milk is okay? I've never had this problem before. I could express milk in the evening if the baby didn't finish sucking it all up, and the expressed milk in a bottle would be separated into layers by morning, but it wouldn't spoil, but now after a few hours, it looks strange, like maybe 1-2 cups.