don't cancel - I've done this and although I was embarrased it worked out for the better - mine was an email - I used to put how I felt in an email to the staff psych (standing on the edge of a strom waiting for it to overwhelm me) and then delete it - once I accidentaly sent it and before I could retrieve it he read it and replied (he wasnt even meant to be in that day!)

Hang in there - it will work out - explain that you left it by acident and take it from there.

P7 (and you are not stupid ok! )