Hmm, I´m not sure if it´s the same thing really.

I don´t have a problem with the actual appointment, I tguess.

Just the night before. When I make appointments that same day, I don´t mind going.

E.g. when my T calls me and says she has an opening, in an hour or so, I can go it´s no problem.

it´s knowing the day before when I go to bed that I´m not "free" the next day and "have" to be somewhere.

Maybe it´s more like a sleep anxiety, I don´t know... I´m just weird.