Thank you for your query.
Please do not panic.You are almost having a panic attack!!!.Everything will be fine.
Take a good antiallergic and nasal decongestants .This seems like a attack of sinusitis
Take regular vapor inhalations.gargle with a medicated gargle thrice daily for 7 days.
take some rest,lots of fluids and engage yourself in some useful hobby.Take some antiacid medications for some days.
I would like you to have a complete health checkup by your physician.
Hope this answers your query.If you have any other queries kindly direct them to me.Wishing your child a speedy recovery.Have a nice day.