((((((((((((((((((( silversparrow )))))))))))))))))))))))))))
DO NOT call back and cancel! What you are feeling is certainly normal.
Don't put too much pressure on yourself. Just take it one session at a time. This first session is just to go and meet her, see if it's a good match, etc. You can tell her as much or as little as you want to. Don't worry about the second session, or the third, or the tenth. Just get through that one session.
Maybe you can take this week before your appt to journal a bit, get your thoughts straight, decide what you want to talk about, etc.
((((((((((((((((((((((((((((( silversparrow ))))))))))))))))))))))))))))))) You're taking a big step - and it's a big, positive, brave, courageous, healing step. Don't turn back. You are doing great.