Hi Danny,
My recovery has been slow. I felt worse 2 years post injury than I was 1 month post injury. And now I feel the best I've felt since being injured. I still have a ways to go, but I feel good and like I was able to make progress and still can.
I don't claim to be an expert on concussions, but I've never seen any concrete evidence of the "2 years number" that gets thrown around, I've just seen it get said repeatedly.
But there are newer studies that suggest otherwise.
Research - Watson Centre for Brain Health
I don't know how well that link embedded, but this is just 1 example of a study done by neuroscientists, showing improvements in people with chronic brain injury after the 2 year mark. If it didn't link properly, I can try again on my computer.
Also, maybe if you post more specifically, how your symptoms got worse, more knowledgable members of NT or other communities may be able to help figure out how to help improve.
Take care of yourself DannyT. I wish you all the best