I had a similar experience from severe burnout - I was overly ambitios and worked for 12 hours + poor sleep. Its like you feel dumb and that you will never rega

I had a similar experience from severe burnout - I was overly ambitios and worked for 12 hours + poor sleep. Its like you feel dumb and that you will never regain the clarity of mind. It took me a couple of years to get back to normal (around four I think). That included a year of therapy and a half of year of just doing the stuff that I like with no job commitment. Some downtime is needed.