Dealing with anxiety

I have had issues with anxiety since I was a freshmen in HS. I just remember the summer before HS I had to do a book report along with questions and vocabulary. It was basically an entire notebook if stuff. This was all due the first week of school. I wasn't just nervous because I was going to be at a new school, but I was nervous because before this I hadn't really taken school that seriously. I just went with the flow of things.