Your symptoms are also familiar to me. Mine started in 2022. I had COVID twice. I got it in January 2022, and then in March of 2022. June 2022 is when I woke up one day sick. I went to my doctor, got blood work. They thought I had RA. Epstein Barr Virus was reactivated and I tested positive for the anti-nuclear antigen titer. The RA doctor was useless and rude. Would not even consider my thoughts about Long COVID. I know that is what I have...3 years later. It is my experience that treating the symptoms is what is needed. Some can't be treated, like the tinnitus, and others. I have found that my ADHD medication (Vyvanse) helps me with fatigue and brain fog (some anyway). I also use Gabapentin and started taking Cymbalta. I do not like using medications, but I have to function. I do not know if you have post-exertion malaise (PEM), but I know in my case, If I do activities (even minor physically or mentally) the next day I feel awful upon awakening. I am in school online, and even writing a paper can cause the PEM. I have to pace myself. I have had to stop eating a lot of salt, sugar and can only drink water. Long COVID mimics so many other autoimmune diseases. I was tested for all of them and did not have them, however, my symptoms are similar to many. Find a doctor (primary care) that is willing to work with you on helping to treat the symptoms. Also, I suggest going to http://www.recovercovid.org
Hang in there...just for today!