Turning 25 makes me nauseous!

I can't believe it. I am turning 25 at 12:01 tomorrow! It's such a horrible age to turn. No longer can I check that little box for the 18-24 age range when asked. I now have to check the 25-32 group! Sigh! :( This descent into the other half of the 20's makes my stomach knot up and makes me sweat. I am so not ready to get old. Where did the years go? I guess I should focus on making the next 5 years something to remember because I am sure I will return to this awful feeling when I get ready to turn 30...gulp!