I took a break for a while and then went back. The most helpful thing for me was to do one year part time with basically half a workload. Don't know if that would be an option for you? I hear what you are saying about feeling like you can't cope / go to class sometimes. When I dropped completely I found that things felt worse, however, because I had nothing to really distract me from my ruminations. Going part time gave me something else to focus on sometimes but was realistic for me with respect to being able to do what was required - even though it was still hard. I also had time to think about stuff and process therapy etc.

Would that be an option?