Women Coaches not coorporating with gymnasts injuries. What are the next steps?

[Gymdancemm11]

I am a gymnast, and I have multiple injuries from my knees to my hips. These are injuries I have to live with, but have learned to manage. I have had my knee injuries since the first half of 5th grade, and I am now a freshman. I just got my hip injuries at the end of last y, year but have started to learn how to manage them. For my knee, I tape underneath and wear a knee brace on the knee that hurts the most.
Most of my coaches understand my injuries, and if I tell them I can't do something because of my injuries, they understand and give me an alternate activity.
But we got a new coach who started in May of this year. We have grown really close, but she has a problem with my injuries. She always tells me they are just excuses. She tells me to suck it up and deal with it. After a while of doing the things that hurt my knees or hips that I was told I had to do, I started crying because I am in so much pain, and I get told to sit out.
I have told my coach, but nothing has changed. I have brought it up to my mom multiple times, and she has addressed my head coach, but again, nothing has changed.
What should be my next step?
Should I show her the doctor's notes?
Should I keep addressing my head coach?
Should I have my mom talk to the coach who is doing this?