From the employer side: The unfortunate reality is that anything resembling "heroic effort" work becomes difficult for teams to manage. It becomes impossible to plan around an employee who may or may not be able to contribute on a given day. Eventually, it becomes clear that relying on an employee to maybe or maybe not put in a couple of heroic days to catch up each week isn't as good for the team, as a whole, as someone who puts in steady and predictable work, even if the overall pace is slower.

I don't mean to detract from your personal issues. However, I would suggest that you work on finding a position that allows you to average out your productivity better over the course of a week.