You talk to someone and ask for help (((((((((((((((tao)))))))))))))
There's no easy answer.... I know that you know that neglecting your coursework is going to make it harder for you and more depressed in the long run. Same with eating... I know you know that you NEED to eat, but you 'just can't'... right? I know what it's like.
Unfortunately I've got no solid advice apart from talking to your T (and possibly your tutors) about it. They are likely to give you more advice and support.
Take care Tao... let us know how you're getting on,
Molly