My son get fever yesterday, but it's gonna be worth, what can i do to make him better?

My 14mo boy was down with high fever last 2weeks for the 2nd time. He dislike fever syrup smell & taste and will throw up food & bm if i forcefully syringe into his mouth so I gave him a 125mg Paracetamol Suppository. This time even after 1hr it doesn't seem subside at 38.8°C from 39°C.. this continues to the 3rd day and thankfully a friend recommendes natural options. Firstly I sponged his whole body with Apple Cider Vinegar mix with warm water then apply a thin layer of egg white on his feet. Then put ByeBye Fever on his underarms, inner thigh and neck area behind ears. 4hours later his temperature brought down to 37.5°C.. oh I did cut onion & put beside bed to kill bacteria & viruses in the air.