What you are going through does not sound silly. It is a very common problem that people go through. Because you are 17, I assume you are likely about to graduate from high school. This is a huge change in your life, so if this is the first time you are experiencing this anxiety
, it is likely a result of the coming change. I encourage you to seek help from a professional. This condition is treatable and you can be helped. I recommend using locator.apa.org to search for a licensed psychologist
near you. Talk it over with your parents and then pursue getting help. I hope you are better soon.