I have ADHD and I find it so uncanny about how much stuff we have in common. I don't think anything else is there besides the ADHD because I have ALL of your symptoms. lol Maybe I have something you might also have too. xD lol Because I'm shy people often question if I do have ADHD. In class I keep to myself and don't really interact with anyone unless they interact with me first. They think you have to be a really open and talkative person to have ADHD but in reality, you don't. I don't have many friends and don't mind if I don't. I'm more of a distraction of myself than I am to others. Sometimes when I'm daydreaming I go to my own little world. It's weird...
Anyway, I have never gotten in trouble for my day dreaming. I don't even think people notice it. However i don't think I get hyper. I think I get more nervous than anything else. I also don't get hyper with sugar or caffeine either. Also I do tend to excel in class and teachers love me as there student because I don't cause a distraction in class.
I really don't think that you may have anything else. These are all symptoms ADHD. Hope that helped :]