You have my empathy for your suffering, Ben. But don't lose heart. You have known tinnitus all your life. You should be able to habituate to this new level of ringing better than some of us who had no prior knowledge that this mad level of ultra high pitch ringing can even exist without the ability to be turned off.
That was what I experienced one night out of the blue this ultra high pitch alien just showed up uninvited. What followed was absolute fear and depression when the sound didn't go away 7/24. Worse, severe hyperacusis soon joined in the horror show, turning all normal sound into glassy, piercingly hurtful sensation, as if my ears were being drilled all day. So I tried to wear ear plugs but the plugs blocked all masking outside sounds, leaving the ultra high pitch screaming T so unbearably harsh to bear. So there it was I was stuck between these two beasts. Every day was a long dark day of sufferings. Worst, relentless anxiety and panic attacks just overwhelmed me. Prior to T I suffered decades of anxiety/panic disorders. So T & H just opened the flood gate of hell of relentless anxiety and panic attacks. My tired and stressed out brain saw no way out of this repeated sufferings. I thought my world would soon end. I thought I never would recover from so much suffering.
But wait a minute. Never say never. Today I am living an absolutely enjoyable and abundant life. T has lost its tyranny over me. The brain has hardened to the same mad scream which used to cause me endless panic. Now I don't give a dime to what T does. Life is back to normal. So I encourage you to hang in there. It is normal to worry about the new condition a bit but don't worry. You won't feel this way forever. If you adopt a positive attitude, get some masking or alternative treatments like TRT, CBT etc., and give it time, you will just come out ok. If those of us who had never known T before it hit us and we can come out ok, believe that you will too. So take it easy and have hope for the future. Try read up all the success stories to give you that hope that you will be just fine too like others. Take care and may God bless your recovery.