I think there is a difference between mental and physical illnesses and how they are/should be treated at uni. University is more a mental task and just like the person with the broken leg may not be able to enter the marathon this week, the person with the mental illness may be handicapped when it comes to working on academic pursuits this term.

I would sit down with paper and pen and think about what you want, day-to-day with your education. If you are having trouble showing up for lectures and they seem a necessity, I would think about that and whether someone could tape them for you or if the material is available online or if maybe you could/should take more courses online? It looks like more flexibility is needed with getting to lectures or with whether they are required so much or if something else could substitute that did not require you to attend so often (certain extra reading or borrowing someone's notes, etc.). Is the lecture given to different groups at different days/times or with different lecturers? Maybe you can go to "any" meeting instead of the one you are scheduled for?

I would see too about taking a longer period of time; maybe doing a course over two periods. I know with my online Oxford certificate there were people who dropped out the previous year and then came back and dropped in to finish "this" year. Too, there were those who got behind in my tutor group and then worked really hard at hols to get back on track and graduate on time.