Don't be afraid to Share the work, everyone wants to contribute (or will if you think that way, act that way, build a team at work), a little humor also goes a long way. It sounds as though you need to find a way to leave your personal issues "at the door"---got a T?
Any chance of doing something before work to help jump start the day/relax the mind and body? (go to gym, take walk, use positive meditation---lots of good u-tube material for exercise/relaxation etc)---after work also...
We are all a bit broken...and, as another says, you do not have to Earn your life. You already have it.