A dry socket is extremely painful and it is not caused by physical trauma, the actual causes of dry socket are not definite, and it usually occurs 3-4 days after the extraction
I think your mother just hit the place of the wound and naturally it bled, and unless you're suffering from complications (plain, swelling, bleeding) I think it can wait until your next appointment :) try to keep the area clean and wash your mouth with diluted hydrogen peroxide,, and get well ;)