I think others like Mark in idaho will give you some better and more detailed/informative advice but I can tell you that brain injuries, especially after you already had a few, are serious and can take a while to recover from.

You can't rush your recovery, you'll feel better when you feel better but in the meantime all you can do is focus on doing things that help your brain, alleviate your symptoms and that make you feel better. There's no timeline on this type of thing, even a doctor can't tell you.

Being anxious and overthinking things is just gonna be bad for your recovery because they put additional stress on your brain and slows down recovery and exacerbates symptoms. Brain injuries are not something you can just brush off. It's best to just relax, keep a positive mindset and focus on what you can control and what makes you feel better. Trust me, I learned the hard way.

Hope that helps a bit and hope you get better.