I'm so sorry! An injury from an assault at work can cause so much additional trauma. I suffered a concussion on March 3 so I'm not that far into my recovery and I'm not also trying to recover from the additional layer of understandable psychological trauma (I fell on ice and lost consciousness) of having been assaulted. Given everything your brain, body, and mind (which I think is its own phenomena) are having to handle, it makes so much sense that work is full of challenges to your recovery. I had tinnitus and hearing loss - voices sounded muffled but certain electronic sounds (cell phone rings, some music, etc.) were intolerable. I am easily fatigued and body temp seems out of whack. Some of the most difficult after-effects are psychological: it's hard not to feel like myself and it's hard to know when/if/how things will get back to "normal" - or if I'll even know what that feels like. I continue to say "I'm sorry but I don't remember ---" so many times and it takes a lot of positive self-talk to cope with feeling so differently abled right now. I've double-booked myself repeatedly and can't remember what I can't remember. It's rotten. I'm sure there are strategies that can help but I haven't figured it out yet.
I am trying to take a lot of breaks from work. I'm learning I might have two good days of what feels like almost normal productivity (though I still struggle with memory and anything that asks me to multi-task) and then need a day of doing nothing. Accepting this is hard but it really seems to help. I hope you have access to professional support for the toll of being assaulted and injured at work and can make the adjustments you need to recover with the compassion and support you deserve.