If you've been worrying an emotional issue for a while now, this could be the day when things clear up. Sometimes it's a sudden insight ("it isn't that they don't like me; it's my insecurity") that makes everything so much easier to see. Sometimes it's harder to pin down what has changed or why. You just feel easier about the whole thing, and that makes everything a whole lot easier to deal with. If things free up, take advantage of the breathing room.