Which specialist to consult for 4-year-old with high fever, cough, and seizure risk?

Hello, My son has slight cough and today morning his temperature raised to 38.7 and we gave Dafalgan, till 23:30 we keep on checking there is no temperature. During early morning around 3:22 he is coughing rigorously and we checked the temperature it’s 40.7 and we gave Dafalgan an again. He is 4 years boy and he has previous nature of getting seizures during high temperature. To whom we need to book an appointment? Also, he used to have ear infection but on March 9th pediatrician from Queen Fabiola checked and confirmed his ears all clear. Do we need to get an immediate check this morning and which specialist will help?