I Have Trouble Falling Asleep at Night?

I am 17 years old and I am out of school for the summer so I stay up a little bit later. I usually try to fall asleep around 11:30 but the past couple of nights I have been just laying there trying to fall asleep and eventually being up till 12:30 or 1. I just have so many things going through my head for my upcoming senior year and that are upsetting me that I cant stop thinking about them before I go to sleep. It is starting to get annoying that I sleep till almost noon and by the time I get moving around its 1:30 and I have lost half my day. Do I need to go to a doctor or should I just let it go?

Suggestion:

Let it go. There is nothing so bad that it can't be handled. Try talking to someone if you can. If you can't talk to someone, talk to God. It's hard to let things go, but not impossible. Just take one day at a time. All will work itself out in the end. Senior year is your best year at high school. Its the easiest year for classes and work. Also its lots of fun to be a senior. You'll be fine, school will be fine, your life will be fine. Don;t worry, be happy, many times things are not what we make them out to be in our minds. Good Luck. You;ll be just fine. things have a way of working themselves out.