I Have Random Daydreams All The Time. Is Somthing Wrong ?

I have had problems concentrating since I was young. I can be in the middle of a conversation and notice somthing and start talking about it then forget I what I was saying or even forget I was talking at all. I have a hard time concentrating on things that aren't interesting to me. I get distracted so easily. I have random daydreams all the time. This is my 2nd year of the 9th grade and I kow how to do everything we are doing but I make little mistakes. In math I know all of it and I can say it out loud but as soon as I have to do the test I make mistakes my work is right but my answers are wronge because of little mistakes. We had to do a problem with all letters and on my work it had the right answer which was t/h= D but on my answer it said 10 and I dont even remember writing it. Or I did a problem exactly right but I accidently put 2 instead of z. I also find myself writing down the wronge answer because I start to daydream . I listen to my music really loud and with ear phones in and I once zoned out so bad I didn't even notice the music and people on the bus could hear it from my earphones. I forget things so easily I can forget what I am suposed to be doing withing a few minutes. Is somthing wronge? Also caffein doesn't make me hyper it makes me sleep. I don't think this has anything to do with it but when I was learning to write I wrote my R backwards.