I developed tinnitus in my very late teens. I took me about 18 months to come to terms with it.
I'm now early 40s, and I just don't know anymore if I have it. I hear a hissing when I lie in bed at night or if I'm in a very quiet room (as I think my tinnitus sounded when I knew for sure that I had it). But since I feel like I no longer remember what silence "sounds" like, I've started to wonder if this is actually what everyone hears and maybe I no longer have tinnitus?
Does that make sense? Basically, because I no longer know what 'normal' should be, because I can't conceive of what would be in the place of the hissing, I don't know whether I have anything 'abnormal'.