Leg fibula pain ( below the knee)

Hi Doctors, My 5 yr old kid have been complaining fibula pain more than a year. Last Jan we have done his blood test ( CBC & Vitamin D3) Found vitamin D3 deficiency & CBC was ok except bit elevated platelets count ( he had cough that time) Been to pediatrician and he told us that kid will have pain as he has vitamin D3 deficiency and nothing to worry and gave us some vitamin D3 medicine and it healed the pain and he didn't complain the pain till this month.he gets pain mostly at night after his outdoor activities ( playing in park etc.) Pain is there for 2 hours and finds difficult to walk and next morning he walks properly. Can you please suggest the treatment? Do we need to take him to the pediatrician again orthopedic? Pls help