My 4yo had a bit of a bump to her foot on the escalator today. Seemed like a non-event but she was very upset for a good 20 minutes afterwards (never the case with her). She struggled to walk or weight bear all day but when sat or laid down (anything where she’s not weight bearing) she’s happy as anything. Won’t let us touch the foot. But I can see a bump on the top of the foot (no bruising, minor swelling). Bar a miraculous recovery overnight, is it best to visit A&E to rule out a fracture or break in the morning? Could this be something more sinister?