Doctor's Visit

I believe I've been struggling with anxiety and depression for years now, and a lot of traumatic things have happened in my life in a short period of time. I've been hurting in silence this whole time, so, thought the good days are okay, the bad days have been getting worse. I had been contemplating talking to my mother about it for a while, and since today started off as a very bad day, I finally made the decision to talk to her about it. It went great, and I asked her if I could look into medication. She said she would make me an appointment with my doctor. She even told me she's surprised it hasn't happened before. Getting this off my chest really made me feel better even though we havent done anything yet. My reason for making this post is asking for advice about what to expect at a doctor's visit. I haven't been officially diagnosed with anxiety or depression (My mother has a lot of advanced nurse experience, and says I have at least anxiety, but I haven't talked to my actual doctor about any of it.), so I figured the first step will be diagnosing me with something. Just wanting to know what to expect, because going in blind is scary. Sorry for the long post, I tend to ramble. Thanks in advance for any advice.