Hi, I'm sixteen and am feeling unbelievably despondent from life and everything I used to enjoy. I used to play several instruments a day, write songs, books, and short stories, and sing until my voice had gone hoarse. I'm sad all the time now, though, and I can't concentrate on anything. I have all the symptoms of depression, but I'm not so sure about bipolar. My half brother has bipolar, and I think my mom does too. I have some really high points though when I race around and clean and use up all my energy and then really low points when I can't even get out of bed. So I think it's bipolar, but I'm not entirely sure.
Also, how do I ask for help? I know I shouldn't be, but I'm really too embarrassed to bring this up to my parents. I already asked my doctor who I should talk to about it and she just brushed me off. I don't want to overwhelm my parents with this new problem, they already have so much on their plates. And I don't know if they'll even believe me-- I'm really good at acting happy and content, but it's all a lie. I'd feel weirdly exposed if I told them, or anyone else.
Please help me. I'm really lost.