I've had tinnitus for a few years now and I've noticed I go through episodes of the ringing getting worse. When I first got tinnitus it was so loud I couldn't focus, sleep, or hear anything else.
Currently when my episodes hit I go through the same thing; loud as fuck and unrelenting. For me it was anxiety that made my suffering unbearable and once I worked on that, with that understanding, I could deal with the episodes much easier.
These days I always come out of the episodes fine and life goes back to normal. 98% of the year I'm completely unaware I have tinnitus because I don't notice it anymore.
I have tips on dealing with tinnitus if interested. Learning to cope was the best I could do and it worked fabulously.