Sudden hearing loss after a long flight

I had a bit of a cold and congestion. 2 flights to get home. A couple of things I noticed. #1. The temp in the 1st plane was bone chilling #2 While listening to a movie, my right ear bud fell out. While trying to retrieve it, I noticed there was no sound in my left. I tried another set, still no sound in the left ear. Thinking that it must be the congestion I really didn't pay much attention. I lost hearing in the same ear before, but it lasted less than a day before the hearing returned. It's funny, my hearing test after that 1st hearing loss, 2 days after the hearing returned my Dr said the test results were better than my last test about a year ago.
Back to the present. 4 days after the flight I visited the Urgent Care, they said I had Estuchian tube dysfunction and I did a regime of Claritin-D (7days) and Afrin nasal spray (3 days) with zero results. The next week (now day 10) I saw my ENT, he hooked me up with another hearing test. 90% loss in noise recognition in the left ear (My Apple Phone Hearing Test confirmed that, LOL). We have started a protocol of 4 injections (2 already have, 2 to go) and Prednisone (into day 6 of 14 days) with zero improvement. I also have been experiencing more frequent spells of dizziness and a relentless ringing!!! UGH!