Is this normal insomnia or severe?

I am an 11 year old girl who is up every night between 2-5am. I have to wake up every morning at 7am for school... Right now, it is 2:05am. And I know I have insomnia, but I have no idea if this is so serious that I need to take it to the doctors. Yes I have done EVERYTHING! From a warm gl of milk or exercise to a warm bath an hour before bed. I turn off the tv, read, and then leave it off for about an hour and a half. If that dont work, I turn it on watch it for about 30min. If that still doesnt work, I do other things like walk my dog in the back to make me tired. After I do everything, I go on here and ask questions about insomnia. I told my mother, and she said she will take me to the doctor... but what will they do??? I have the TAKs test tomorrow, which is to see if you p, and I am awake at 2am! I mean seriously, it gets so bad that I cant have sleepovers or go to any because of it. :/ Do you have any suggestions what they will give to an 11 year old at the doctor for it and if it is severe???