Last time I joined GT, I was at a job where I had to write about 500 words per hour, give or take. I was really productive for the first weeks or months, but then things began to go wrong. Some of you will remember this. I went from writing a blog post every half hour to writing one every hour, then two hours, then maybe two in a day if I was lucky. I was exhausted all the time, barely able to stay awake after lunch. I couldn't focus for shit.
I vented a lot of frustration here in these forums, and people were very helpful in validating that I might have depression. I even got re-evaluated for ADHD, and tried a medication switch on that end first, but nothing helped. Today I am medicated for depression as well, and it's improved my life in a lot of ways—except that there are some things you never get back.
I've been working with my therapist on this, because if I want to go to grad school I can't just be there for half the day. But the 9 to 5 workday (or in my case 8:30-4:30, 8-4 when I can) just doesn't work. It's something I may need to accept is never going to come back.
So that's that. Depression sucks balls and it changes your life and your brain.