Hello astronoe!

It's good that you made an appointment, I assume, with a psychotherapist.

It is possible that you have some issues to work on, but I'm not a psychotherapist.

One way to cope is distractions like the games forum here or some kind of entertainment-sports, movies.

Another way is to exercise and or meditate.

You can come here to PsychCentral to post feelings. You could go to the chat rooms here.
You could private message PC members as well to share if you need to.

You have to focus at what's at hand-whether is work, driving the car, etc.

I feel you need more self confidence but I will stop there as I do not want interfere with what the psychotherapist thinks is needed after the appointment.

I hope I have left you with some useful suggestions. Other members will be around, maybe they will have additional suggestions.