Hi.. An ENT Specialist here..
Do you have a previous history of nasal blockage or earache or fever? Gradual loss of hearing can be due to various reasons, from medications to environment exposure, however, sudden loss of hearing is an emergency situation. Earlier identification of cause and management can save your hearing. Consult an ENT specialist immediately and get your hearing checked.
Next Steps
Consult an ENT specialist and get an audiometry done after examination.
Health Tips
In the absence of all the symptoms as asked earlier, it could be "sudden sensorineural hearing loss". Although even with treatment recovery is not guaranteed, earliest administration of treatment is crucial.