No home remedy may help.the yellow green thing may be discharge,may not be wax.With itching and feeling of fullness and fluid and pain in ear
,it may be a fungal infection
.This needs to be cleaned out by an ENT
surgeon and drops like Myclin-O may be instilled 5 drops thrice daily with pressing it into the ear nicely.You may use these drops,then visit an ENT doctor
after a week to get ear cleaned.the throat discharge is not related to this as your ear discharge is not mucus like.