You need to visit a gynecologist and possibly start treatment for yeast infection, however the white discharge may also be just the colour of your natural lubricant.
Do not worry, just visit a doctor to be on the safe side.
Best wishes, John.
Iv had the same problem. Ever since i was like 11 i had the discharge and didnt get my period until i was about 13. i havent done anything about it, and am now nearly 19...I only realised that it could be thrush.
Just go see a doctor, and dont be shy, they'v treated many girls with downstairs problems.