I’m sorry to hear that. I started treating for Lyme, Bart and babesia and mine started improving. It went away for a while and I could sleep again. It comes and goes now when I ramp up treatment. Japanese Knotweed helped my voice issues. I never got croaky, but I had issues in my throat for sure. It’s gone now. Have you tried to treat for Lyme and coinfections?? I know you tested negative, but that test is garbage and with a history of afib and head symptoms, I strongly suggest you look into it more. It screams Lyme!
It is definitely something I was strongly suspicious of initially but after the negative test I knew the likelihood of that being investigated further by my doctor was zilch.
How did you get tested/a positive test, and what treatment are you on for those conditions?