your issue is complicated and well beyond what can be addressed in a public forum. I suggest you visit my website http://www.DrLam.com
and repost the question where I can answer you in confidence.
suffice to say that your history tinnitus triggered first by steroid and worsen by infectious process lead me to think of the less common pathways where tinnitus can be induced and thus I need more information to discuss with you proior to any conclusion.