Hi, 
Most like its menieres disease.Meniere's disease is a disorder of the 
inner ear that causes episodes in which you feel like spinning (vertigo), and you have fluctuating 
hearing loss with a progressive, ultimately permanent loss of hearing, ringing in the ear (tinnitus), and sometimes a feeling of fullness or pressure in your ear. In most cases, Meniere's disease affects only one ear. 
So classic feature of menieres are 
Sensorinual hearing looss 
Vertigo 
Tinnitus 
Aural fulness. 
You are not having 
labyrinthitis.All your symptoms points towards menieres.A thoruough investigation should be done as menieres is disease of exclusion.Test advice are - 
1-A hearing test (
audiometry) assesses how well you detect sounds at different pitches and volumes and how well you distinguish between similar-sounding words. 
2-Vestibular evoked myogenic potentials (VEMP) testing 
3-Caloric test of inner ears 
Treatment consist of low sodium diet along with diuretic 
tablet stemetil and ativan acn be taken for verigo off and on as per your depand. 
advice
please go for a MRI brain and consult a neurotologist. 
Secondly no locally given 
hydrocortisone does not increase the levels of blood sugars.
Go to a a neurotologist for complete investigations.