The Internet and this subreddict are skewed by a loud and frightening minority of a minority. Everybody gets tinnitus sometimes, but only a minority have it all the time, and of that minority, only a further minority feel it diminishes their quality of life. Think: would people come to this subreddict to say "I have this and it doesn't bother me"? No! That would be gloating!

First off, see your GP tomorrow and an ENT after that if he recommends it. Listen to him, try whatever he suggests (antibiotics, supplements, etc), and if he says, "Don't worry about it, it will go away," trust that his education and years of experience are more reliable than the echo chamber of the internet. Be patient, and don't fixate on it.

If you DO have chronic T, which I doubt, have faith that you will eventually habituate. Many people with chronic T say years down the line, "I only notice it when I try to hear it," and they aren't lying - they quite literally DON'T hear it. While damaged ears don't regenerate, the brain does, and with time it can tune out the frequency of the T. Practically speaking, it's the same as silence.

Because, before you had tinnitus, if you sat in a quiet room, what did you hear? Not silence, there's no such thing. Instead you probably heard some kind of white noise as your brain overcompensated for a lack of stimulus. Tinnitus is that with the volume of certain frequencies turned up.

"Fear is the mind killer." Panic is always a temporary symptom. Hang in there, you will be fine.