Totally understand. My motto to myself is - keep going, keep going but at the same time - just give up already! I do wonder at why i go to uni when it is the last thing i want to do!!
Always be responsible, always get work in on time no matter how bad i have been feeling (even if its rubbish!), always do this and that....jeez no wonder i've come home! But i still have those thoughts - do this, write that email, phone that person, write refs for that essay. I cannot seem to listen to ppl telling me to slow down. Even though i myself have told them i cannot continue.

No sense. Feel for you. PM me anytime.