For 2-3 years I have had blood in my stools?

Hello I am a 17 year old female. For 2-3 years I have had blood in my stool. I have also, from time to time, had maroon-colored or white discharge come out. I’ve also had oil in my stool. I know this is not normal but I’m scared to tell my parents and to have to go to the doctor. May you please help me determine what is wrong with my colon.