Pain below the navel on the first day, especially if severe, should not be managed with repeated doses of Drotin DS alone, as it only relieves spasms and may mask a serious problem like Appendicitis or a urinary/gynecological issue. Avoid giving more medicines except a single dose of Paracetamol if needed, keep her hydrated, and do not delay, take her to a doctor or emergency for proper examination and tests, especially if pain increases, shifts to the right side, or is associated with fever or vomiting.