I doubt that it's constipation or indigestion. A snake's digestive system is designed to handle pretty large meals so I doubt if a mouse would be much of a problem to a young Ball.

More than likely she is either going into shed or is reducing her energy level in order to digest the meal. Digestion takes a LOT of energy for a snake so you typically won't see them very active after they eat. She may have curled up in the corner because it might be warmer than in her hide, and they tend to seek out a warm location in order to aid digestion.

I'm sure she'll be up and about like her old self in no time.