On this one, I disagree with allmymarbles completely.
First, no one can tell you if you have ADD or ADHD with certainty based on what you have described. Not even a psychiatrist specializing in ADHD would make that assessment based on a paragraph of information. To make that kind of an observation is based on personal bias - simply because there is not enough information given to make a definitive statement.
So now I will go with my own personal biases based on a lot of years working with kids with ADHD/ADD. Remember that this is my opinion.
Your examples are very consistent with ADD. You can check this link on Medhelp -
for symptoms or just google it.
Another source which I think that you will find very interesting is this Utube video by a young lady with ADD in which she describes her situation and symptoms.
Personally, I have found that frustration was a key factor in helping to identify a person with ADD. Essentially, they were always intelligent, but not performing at the level they expected to. Many times they had outstanding standardized test results in elementary school in the lower grades, but the scores began to drop as the subject matter and length of tests increased. As school got harder, they had to study more and more. In short they were putting in many more hours than their fellow students and not seeing the results. Many times they would take a test - knowing the information- and when they got it back found out that they had made many simple mistakes because they lost concentration. Worst of all, they would have friends who were getting better grades and they knew that they were smarter and studied harder then their friends.
I could go on and on, but each and every example that you have mentioned I have seen in kids with ADD. In a way its sad - If you were the hyperactive little boy, you probably would have been identified in the first grade. But because you had the intelligence and the desire to try and overcome your problems (and also girls get overlooked a lot), it was not noticed. There are a lot of adults in this world who tried going through high school and college with undiagnosed ADD and are now paying a huge mental price. Its no joking matter to them. Which is why I don't think that it should be lightly dismissed as a "puberty" trait. Why anyone would want to condemn you to these problems without seeking a more informed guidance is beyond me!
If you really do have ADD, it is super important to find out. In the first place, medication does not have to be used. But if you know what you have got, then its a heck of a lot easier to deal with it. There are better study techniques that can be employed. If you are diagnosed you would qualify for a 504 special education plan that would give you more time on tests. It would also explain to teachers why you might "zone out" in class. It can even give you more time on SAT's etc.
Once you have looked at all the information (and I have got a feeling that you have been doing some research or you wouldn't have come to this site), you need to figure out whats next. One thing that may help is the book, "The ADD/ ADHD Answer book," by Susan Ashley. You might want to share it with your parents.
I would definitely talk with your highschool counselor and seek their help in ways to approach your parents. I would think that your parents would like to know that you are not lazy, but actually have a condition that can be dealt with and would explain what has been going on.
Of course, all of this is based on my opinion that you exhibit many of the characteristics that I have seen in my own students and have read posts about on this site for the last 3.5 years. I could be wrong, but then you would also have a better feeling for what is going on and how to deal with it. Good luck - and if you have any other questions, please post.