Profootball has a lower standard for return to play. The players have a low cognitive load during the week with activity targeted at recovery.

The hours you work puts an extreme load and likely hit a critical mass that caused your regression.

But, It is actually very common for delayed symptoms. The brain tries to continue to function with damaged nerve fibers. It those fibers do not improve, the surrounding cells send out shut down and die signal.

The people on this site tend to be the ones who did not recover spontaneously in the first 6 weeks or so as 85% do. Some delayed their recovery by pushing too hard right after their concussion. It may take a while for them to reach a point of desperation and slow down so their brain can get the rest it needs.