I’m sorry to read you have sshl.
My left ear was impacted by this in Oct 2014. I got up one morning, and walking from bed to bathroom, the ear felt like it filled up with water; and hearing decreased. I got in to my PCP immediately. Unfortunately she treated it as an ear infection for 2 weeks; by the time I was sent to ENT, he said it was likely too late to reverse it. He said if it be reversed at all, the intratympanic injections must happen within the first 4 to 5 days. I did have the intratympanic injections of steroids. There was slight improvement after the first 3; 2 weeks break and then I had another round of 3. But it didn’t help. I had moderate hearing loss and started using a hearing aid in that one ear, which helped greatly. The tinnitus was a nuisance.
Jump forward to Sept 2019, I was sitting watching TV and suddenly all the sound changed. My left ear (the first one impacted) is now profound loss; and the right is moderate. Nov 1 2019 I picked up a new pair of hearing aids which were helping. The tinnitus wa==is much louder, constant, and in both ears.
The ENT I saw thought that maybe 8 years of high doses of NSAIDs were the cause. Later, the thought is that it is auto immune, I already have 3 other auto immune diseases. Once you have one, you are highly likely to develop others. So the cause it not really clear, in my case.
Sorry I can’t be encouraging.