Whenever you get a sore throat it's best to see a doctor to rule out anything serious...like meningitis, mumps, etc.
But it's probably just the sinuses along with some post nasal drip.
Hello and hope you are doing well.
Looks like you have developed a sinus infection which has progressed to a throat infection as well. Sinus infections cause headaches. There are tubes called 'Eustachian tubes' which connect the middle ear to the throat, this balances the air pressure in the ears. This tube can get blocked due to infections of the throat, which can give lead to a feeling of fullness in the ears and the resultant sounds. This can also result in infection of the ears. Consult your primary care physician who will do blood tests and take a throat swab to determine the cause and prescribe appropriate medications. The blocked ears can be opened up by the valsalva maneuver, where air is blown into the cheeks against a closed nostrils, this sometimes helps to open up the tubes. Steam inhalations and salt water gargles can help. Take (OTC) tylenol (acetaminophen) or ibuprofen for pain.
Hope this helped and do keep us posted.