I feel so old!!

So, today, at approximately 2:43 in the afternoon, my beautiful baby boy turned...6. 6. That age now requires 2 hands to count it out. He's not free at places anymore. I AM OLD!! Well, I feel old! But I am so proud of him. He really has turned out to be a fairly well adjusted kid, so we must be doing something right. And here I go getting all maudlin, but I swear to God, it was just yesterday that he was in diapers, and crawling, and it is so hard to realize that he is growing up. And, we are so overprotective (I've been told, so I must be!) that I am not handling it well. People say all the time, he's 6, let him do such-and-such by himself. But I get so worried. I don't let him go through a place to go to the bathroom by himself, we walk him there, and Steve goes in too. I usually start to freak out if I'm the only parent there, and he goes in by himself. I feel so neurotic, but I do watch the news, so it's hard to relax. What am I going to do when he's a teenager? AUGH!!! I need a drink or Prozac or Valium or something! How did our parents handle this???