Suggest Remedy For ADHD

Hi. I m 18 and about to leave the house for college still. I ve always had problems concentrating- it has caused my grades to drop in the past 2 years and my behavior in class to stick out. I never seem to get anything done, and have dropped several things I even loved doing, like being in swimming or the HOSA club, just because I can t focus on it for more than a few minutes at a time. My mom doesn t believe in ADD, but she always tells me to get back on task and is the person to keep me focused. I am concerned that when I leave her house for college, I will fail to focus on anything and start really failing. I d like to talk to a doctor but I don t know how to without her, because my name is on her insurance etc. I feel I have ADD and need a low dose medication to help me.