Bell sound in my ears?

there is this sound in my ears. I’m not sure if it’s tinnitus or something else. I went to doctor to get my ears checked. I’ve got my hearing and eardrums tested. they are perfectly fine. The doctor said it might be from listening the music so loud or stress. I just hear it if I really focus on it. But sometimes from my right ear there is this bell sound coming amd goes after a few seconds or minutes. Do you think its fine or I don't know can it be anything else? Doctor said that I’m fine but I don't know I guess I’m just overthinking
Bell sound in my ears?
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