I have about 18 years of experience with tinnitus. I remember when it started, initially with frantic ear cleaning, MRIs, classical music.
Later I tried everything, I have come to the conclusion that you learn to live with it. It means it's not going anywhere. I was in my twenties at the time.
I think if you can't get rid of it, you have to make a friend of it.
Worst case scenario, something like loud banging your finger behind your ear to tap it helps. Noise also helps. For me, head position changes it, as does contracting the muscles in the neck and neck. Poor sleep, hypertension.