Hi mummy!
Unfortunately, it happened to my son too and he refused to eat almost everything we gave him.
I tried cold jelly, vanilla ice cream and yoghurt. He did accept some yoghurt but I guess it hurt after awhile so he rejected it.
The only way is the super cold milk. We made his formula and leave it in the freezer for 30mins and it gets very cold. He will only drink milk for the 5 days.
At the 6th day he started to feel better and took in the porridge.
We went to his PD and got some numbing drops and painkillers. So it may have helped.
I hope your son get wells soon 🙏🏽