Good point, try to focus on the relief you will feel, not the actual visit.
Also, think ahead, like if the appt is at 1:00 by 1:30 ish you will be walking back to your car, only need to put in a half hour (or less) of talking.
Do you use deep slow breathing or singing songs in your head or any other distractions to cope with your anxiety? Do you own a stress ball, you know those small ones you hold in your hand and squish?
A distraction like that might help. You will also have your phone while you wait, take ear buds, listen to music or silly youtube videos.