I did essentially the same thing when I was in college many years ago. I didn't realize I had fallen into depression and it was rough to pull myself out of that.

I second that you should reach out to your therapist about it, but I'm worried that your partner isn't sympathetic regarding your depression. If he doesn't respect it, he isn't respecting you and there is no world where I can see him understanding or respecting your needs if he's holding you to his bizarre standard of productivity.