This is a hard question that probably will be misunderstood, but can anyone help me with this?

Im 14 and believe i have generalized anxiety disorder.
Overall since ive discovered this i have been able to control myself when it comes down to stressing about normal stuff. But it seems lately i get really tense. While reading, taking tests, or even watching tv i cannot concentrate. And the biggest irrational part is i cant concentrate because i remember that the last time i could not concentrate, then i start to think to hard and over analyzing, sometimes it even leaves me with a headache.
symptoms from GAD says that you have trouble realizing reality and suffer with irrational thoughts.
Im stressed and afraid to go to the doctor because i wouldn’t know how to explain it to him/her, or since i have self diagnosed myself i wouldn’t want her/him to think i was making it up and overall i think the problems im worrying myself about are ridiculous.
plz any answers will help, thanks.

Go to the doctor.

Do not say “I have generalized anxiety disorder”

Say “Hey doc, I haven’t been feeling that well lately,” Then go on to explain the symptoms that lead you to believe you have generalized anxiety disorder. Ask your doctor to refer you to a counselor or a shrink. Please do not use your own diagnosis as the end all be all, you are 14, you need a doctor’s opinion.

Take the Generalized Anxiety Disorder Test and Know If You Are GAD Free Or Not