Geez Lyndsie,
You have my utmost empathy here. Very detailed report helps give folks here some foundation for your issue. Is there any chance you could’ve had a stroke that affected the right ear so instantaneously? Or would the MRI have found that out?
I will often have a change in hearing in one ear due to atmospheric pressure (high, low, rain, etc.,) but nothing as dramatic as you’ve had. It’s so critical to keep the word comprehension UP in that right ear - via some mechanism that transmits the sound from good ear to bad.
I hope there are further discoveries and resolution to this SSHL, and that you keep us informed. Neville’s suggestion of a Roger device seems excellent. I’m also looking in to that for better speech in LOUD noise conditions. It’s the HOLY GRAIL among us all.
Best of luck to you in the journey for answers.