It took many years for doctors to diagnose one of the autoimmune diseases I have and that is largely because they refused to listen to a 16-19 year old girl.
I've had doctors look me in the face and tell me they refuse to treat me and I should call an ambulance for drugs.
I've had nurses pull me to the side and tell me I must have been raped when I very clearly expressed other symptoms.
I once had a doctor give me a bullshit diagnosis of "ulceritis" and that I just get ulcers on my body sometimes and there's nothing they can do.
The doctor who finally listened to me and diagnosed me has my forever gratitude. I'll always remember her name. She changed my entire life for the better just by listening to me.