Don't get just one hearing aid. I've never understood the logic to having a "good ear" and a "bad ear", unless of course you already have good hearing in one and bad in the other.
Unfortunately, one of my ears is "mostly dead", and the gain needed to get sound across is above my pain threshold. But I "still" get two aids....both for the "good" ear. Then I alternate them day by day.
Keep your eyes peeled (or perhaps ear to the ground might be more appropriate for the thread topic) for info on adult stem cell treatment for "nerve damage" deafness. Apparently great strides are being made. I've read one case study of a young lady who was majoring in music, who developed a rapidly advancing nerve damage loss to the point that she was virtually totally deaf in one ear and about "half-deaf" in the "good" ear. Her parents were both physicians, and they became aware of a stem cell treatment, so they put her through it. She got about 50% recovery in the "bad" ear, and virtually totally normal hearing in the "good" one.