I'm not going to the hospital with my mum for her appointment
What is your reason for not wanting to accompany your mom to her appointment?
I can't stand seeing her in pain.
While it can be hard to see your mum in pain, I'm sure it would be a great comfort to have you with her. You should reconsider going with your mum for her sake. Maybe you can leave the room during the painful parts.
Nah, I can't do it. I'm not a good kid.
I am sure you mom would love for you to make the trip for her. Maybe her seeing you there will also give her strength to fight through the appointment and get well.