Rephrase the question: should i get off my ADD meds?

I asked this before, and basically just got flamed by somebody who thought I didn't actually have ADD? 0.o Weird...basically, I need my ADD meds to do well in school because, well, I'm ADD. I can't concentrate on tests-or papers, or notes, or whatever the teacher's saying-because it's like there are too many things to think about. There's the air conditioning in the hallway, the people opening their lockers, papers rustling, Akailah's squeaky chair, my gles and their annoying habit of sliding down my face due to being broken, what's for lunch, what I did last night-I could go on and on. But I don't like how they change me. If I don't think enough off my meds, I think too much on them. There's been a lot of bad stuff going on lately, personal stuff, that I would rather not get into now. I stress out about that, I can't stop thinking about it, and I freak out about grades. Typically I tend to think I'm failing a cl-got straight A's all year, so obviously that wasn't true, but when I'm on my meds I think that. Most of the time when I'm on my meds, I'll spend the whole day worrying and freaking out, trying to remember what I've forgotten. Most of the time I'll ditch lunch early to try and sneak into my locker, to look for something that I might have not done. What's I've checked every possible thing I could have forgotten, I'll stress out more, because it would make sense for me to forget what I've forgotten, but maybe it's something important. Most of the time, I didn't forget anything and just annoy my friends. Also...because of said bad personal things, I've found myself being seriously depressed...all the time? I don't know if my meds caused that or not, but I'm not on my meds today because I forgot and it made such a difference-I felt like I was a different person. It just kinda shocked me, I guess I haven't skipped my meds in too long. And I like it more off my meds-I'm actually *happy* all the time. Weird, eh? But I need them for school, grades are very important my family and I. High school is right around the corner, and colleges look at those grades, and if I want to be a chemical engineer or any type of scientist like my dad I need good grades to get into a good college. So I have to choose...get rid of the weird personality change and watch my grades tank along with it, or just get over it and have good grades? Oh and if it makes a difference, I was diagnosed when I was around six or seven, and my littlest brother, who just turned eight, just got diagnosed-apparently it can be genetic, who knew?- but my parents are hesitant about putting him on meds, even though he literally is failing. I switch my meds up a lot, so switching them wouldn't be a big deal if any of y'all have suggestions-I'm on metadate right now.