Hi..... In 2016 I was taking three powerful antibiotics at the same time for a difficult to treat lung problem. After 4 months of the antibiotics I suddenly lost some hearing in my left ear, and a week later in the right. Also developed vertigo. I was given oral steroids then steroid injections and it did improve my hearing. But only temporarily. Over the course of four years it has gradually gotten worse to the point where there is severe loss in one ear and profound in the other. I have had the course of steroids 3 times and followed up with steroid injections into my ears each time. The last course of both oral and injections did not improve the hearing at all. The vertigo is with me 24/7 and my balance is terrible, have to be so careful not to fall.
Meniere's disease has been ruled out for me. Doctor's are of differing opinions as to whether the original cause was inflammation from an autoimmune disease that I have or from the antibiotics that I took.
Apparently there can be many causes for sudden hearing loss. In your case it seems a real puzzle since you had no underlying health issues. I am glad you jumped on it so quickly and are doing research as well and I hope that everything is only temporary for you. This is a good group to stay connected with and relate to those with similar issues. Good luck to you. Judy