Looking for advice

I have always struggled with mild anxiety, but ever since my daughter was born I feel as though it has gotten worse. I'm reaching a point to where I feel like I am ready to speak with my doctor. But of course I have anxiety about that and what to say! I feel like I won't be taken seriously. But I really don't know what to say when I get there. Can anyone give me some advice. What did you say the first time going to the doctor?