I feel so overwhelmed with everything.....sometimes i feel like just ending it all?

I'm in my second year of a teacher training degree but I don't know what to do...... I'm so stressed out, I feel so overwhelmed i just sit and cry at times. I enjoy teaching but have had a tough year this year and have fallen behind. I dont think i want to quit, but i would love to just switch off from everything for a while, i feel like i cant cope. Theres been things in my past that i find hard to come to terms with, but whenever i try to talk to my parents they say i'm over-reacting so now i bottle things up. I went to see a psychologist and was diagnosed with severe clinical anxiety and mild depression but had to stop going as i could no longer afford the �60 an hour fee. I've talked to my lecturers but i get the impression they think i cant be bothered as i missed lots of lectures due to panic attacks as i was so stressed. I just dont know what to do any more, i dont wanna kill myself but i feel like crawling into a box and curling up and just falling asleep for a long long time..