ADD, what to do?!

I'm pretty sure I have ADD but haven't been tested (it's soo expensive)!. My mom swears I have it, it runs a little in my family, my friends always tell me how sidetracked I get, I am in advanced classes yet I haven't been getting good grades in the last few years at all because I don't do my a lot work!. Sometimes in school I can't focus so much that it's nearly impossible to do an assignment so I just don't!. I'm not that hyper so it's not ADHD!. Should I get tested and be put on meds for the next school year to see if it helps, or should I just keep trying to overcome it myself (which hasn't worked so far)!. Oh and I really don't want to lose weight and I know some meds do that!. Ideas!? Oh and I'm 15!. ThanksWww@Answer-Health@Com

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