I've had one of the worst depressive episodes since I've started uni. I'm failing 2/4 subjects. I just got an email from my personal teacher frim one of my subjects who (very kindly) asked me where my overdue last assignment was and reminding me that my exam was tomorrow. I don't have the assignment and I'm not going to that exam. 

I know I'm going to fail because of the missed coursework and me not knowing any subject content because of all my missed lectures. 

I feel really bad though because she's made an attempt to reach out, and she's probably waiting by for my essay and doesn't want to fail me, because I'm genuinely interested and participate in class occasionally. How do I tell her that I just can't finish the subject and I have just resigned myself to failure?