I would look the snake over. Make sure nothing is obviously wrong and check your numbers. If everything checks out I would think it's just being a snake. A hiding snake is usually a happy snake.

Plus I'm sure you are not able to watch it 24/7 so maybe you've just missed it coming out. My Ball is not out much that I see. My Bloods seem to hardly move at all.... Unless food is in the room.

If there are no signs of shed I don't see why you couldn't feed, I would. I don't wait for my snakes to be out and about. I feed them when it's time and they come out just fine.