Can you be depressed and still maintain a good level of productivity?

Alright, so I'm asking this question because everyday I feel like shit at the end of the day. I work basically everyday and I like to think I try to be as productive as I can. I just never really feel happy, at most I'm a meh and if I'm not a meh then I'm on the verge of like crying or some shit at the end of the day. Usually I never cry, but now I cry at least once a week at the end of the day. I'm going to assume it's due to stress since crying is a natural stress reliver and all. I guess I just build up stress throughout the week and I just let it all out then I feel better and just do it all over again.

Totally tmi, but I hardly care at this point.
Can you be depressed and still maintain a good level of productivity?
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