Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: I'm 26F, have quite damaged teeth from a disease and visit the Dental clinic here quite often. Some treatments are more expensive, my budget tight, so i got offered a place in the student courses. Nice girl there treted me amazingly well, but there still was stuff to do, so she asked me if i wanted to be her friends patient in her exam. I agreed. 

Monday then the exams started. We made three appointments for this week, one on monday, one yesterday and the third should be on friday. I was really looking forward to the first one, convinced that all would go well, cause the students knew their stuff (like the first girl who treated me amazingly.)

But what should i say: It was a disaster. It was 3 1/2 hours of pain, the other student being so nervous and hysterical, that she made easily avoidable mistakes  and i cried on my way home for an hour straight. My mouth angles are burnt by acid she misused, the local anesthesia, which she injected wrong 3 times has my whole mouth swollen up till today.

Tuesday i returned, because as i said i somehow felt commited to help the genuinely nice girl to pass her exam and not letting her down, but yesterday was just as bad. I told her about my mouth angles and asked her to be careful, told her where else i was in pain and just asked for a bit of consideration (she wanted to do the other side this time, so not working in the same area as the day before), but in the end her nervousness got the best of her and she got tense and bitchy and completely didn't care for how i felt at all anymore. 

That was the second day i returned home crying, not able to eat or drink or speak, cause my tongue got burned, the other mouth angle looks the same and everything has swollen up in my mouth and still is right now.

Friday would be our last appointment and i just don't want to go. I never had anxiety about dentists, i already fell asleep on the chair more than once cause i'm usually so relaxed, but right now the pure thought is the horror to me. Everything still hurts and i don't think any off the pain will be gone by friday and sitting there for another 3 1/2 hours just seems like the last thing in the world i want to do.  
I'm not sure if they would manage replacement for me (a friend of hers already cancelled his appointment for thursday and she was losing it, because she had to find someone else on time) if she couldnt find someone herself and I don't know how this would affect her in total - i feel miserable for letting her down. 

So now im stuck between my own well-being and withstanding one last 210 minute long torture to not feel bad about disappointing her. If I want to be fair I should cancel that appointment today, so she has as much time as possible to find a replacement, but im still struggling for what to do.

  
So WIBTA for cancelling the appointment?

(I'm very sorry for my bad english. Not my first language and don't speak english that much, so got kind of rusty.)

cancelling the exam-appointment