Your first time getting help?

As someone who has wanted to get help for anxiety for years but is too worried about being dismissed, how did seeing a doctor for the first time go for you?

I am really anxious about the whole thing and mainly what to say to actually be listened to. I tried to speak to my doctor once but she dismissed me as i was graduating at the time. I want to try again and I need help but i dont know what to say or how to start the conversation?