Ibuprofen should bring down the temperature. If it didn't at all then you should bring your baby to the hospital. If it did then you may consider to give paracetamol 3 hours after given ibuprofen but check is the temperature going up first before you give paracetamol. If is not then need not have to give. You may also want to consider to bring your baby for TCM tuina (similar as massage) which may help to bring down the temperature. The clinic is located opposite the Kembangan MRT station. https://www.yuguotcm.com.sg/ Above are my 2 cents worth for your consideration. Please bring your baby to the hospital if fever doesn't subside. Take care.
Alex