From the details provided,I suspect the chance of pericoronitis
developed in your mouth due to impacted wisdom tooth
A thorough clinical evaluation by a dentist
is required to give exact diagnosis.
Dry ,sore tongue may be developed due to dry mouth or depapillation of tongue.
Avoid using sharp tongue scrapers.
If required,salivary substitutes can be administered.
Maintain oral hygiene
Get your teeth cleaned.