Teenagers can be brutal, I would recommend that you take her to one of your Dr. appoitments so she can hear and see for herself that this is a very difficult disease. I also would print out a few articles on RA and symptoms and ask her to read them. My kids hate it when I am wiped out all the time and I need to take so many naps, but they understand what RA is and how bad it hurts me. I hope my suggestions help.
Be well
Marie