There are times in all of our lives that we all have to do what we need to do, whatever that may be, to solve a very important problem, no matter how difficult it turns out to be for us to do. This includes our mental and physical wellbeing. So do what you know you need to do. Reschedule. If you cannot trust yourself now in this, when can you trust yourself? BTW I do not like doctors or hospitals or medication. But I make use of all of this when I need to.