What is the likely hood that I have permanent tinnitus at age 16. It just occurred one day whilst watching t.V. I don' listen to loud music + no wax v?

Very unlikely! Tinnitus can frequently come and go! medication can help! see your pcp, and if no benefit is gained, go to an ENT doc!
See doctor . If u have persistent ringing in your ears then you should see a doctor. You should get a brain MRI . We need to make sure this isn't something serious.