It appears trying an anxiolytic would be worth it. Calming your mind may help you deal with the tinnitus. I don't know dosages for Xanax but when I was prescribed Klonopin, I only took 1/2 the prescribed dose and did well.

Anxiety can make any PCS symptom worse, so reducing your anxiety should help reduce your other symptoms. Or maybe just stabilize them so they do not spike.

My best to you.