I went to the doctor's today, after I booked the appointment on Monday. The doctor (a woman) was very understanding - although she did say that she'll have to hospitalise me if I get more suicidal, after I promised not to do anything until I got back from Dan's.
I'm now on Sertraline. I don't like it - it's making me tired and sore and achey, but it'll take two weeks to kick in. I'm hoping the side effects wear off soon.