How loud was your tinnitus compared to everyday noises? Mine can be masked by urban environment during the day, and my doctor never used a stethoscope on me yet.
At times I'm wondering if the Cicada emergence (17 year brood here) is masking tinnitus or if tinnitus will mask the cicadas.
As they get louder, I can easily hear them over tinnitus. The cicada sound itself is interesting. Distant ones combine to make a sort of steady hum, almost a whistling noise. Ones that are close by make a distinctive sharp wavering buzzing noise. The sounds are distinctive and there doesn't seem to be any in between.