14 year old, has Generalized Anxiety Disorder (GAD), bipolar?

I am 14, and have no medical history. So here’s the thing, i have symptoms of anxiety, depression and i have alot of mood swings. i can never stay focused and sometimes blank out. I cant ever study well be cause nothing sticks and i need the teacher to repeat what she says so i get it. I will get headaches for no apparent reason and i have trouble sleep, yet im tired everyday. When I search up the what it could be i get a lot of different diseases and disorder. like GAD, bipolar, etc. Ive had these symptoms for a while now.

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