Same thing happened to me a week ago. I’m eight months post concussion, with considerable fatigue and some residual vision/vestibular issues... and a cupboard door whacked the side of my head a week ago.

I now feel like I’ve been set back by 4-5 months. My headaches, fatigue, and vestibular issues are all maybe 30% worse. I was just barely holding onto my job, and now I feel like I’m done.