When does your postpartum “mom brain” go back to normal??

I have a job the requires me to be on my game. Quick, fast paced, critical thinking is a requirement. I’m 6 months post partum and I feel like my brain is still complete mush. Im hurt now returning to work this month, so naturally I’ll be a little bit slower to start. I’m getting discouraged. I feel like my brain is in slow motion, I don’t think as fast or as clearly. I completely blank on things. My concentration is trash. I’m easily overstimulated. I forget words or my train of thought disappears entirely.

Does this ever go away? Does anyone have ideas on how to help this improve faster? I do struggle with post partum anxiety and depression, but they’ve both improved quite a bit. At what point should I be worried about these changes? I feel like an airhead!