Almost 40?

I guess I expected an invitation.  Heck...I would even settle for the sign that the drivers hold up at the airport with my name on it.  But there was nothing. Only a small birthday celebration with a few friends and way too much birthday cake.  But I want a guide.  There must be a guide.  Is there a guide? There has to be someone who thought it pertinent to tell me and everyone else about how your hair gets gray EVERYWHERE.  How you forget things and it requires an act of Congress to get you to remember. There must be a book that explains what the heck all those vitamins are in the vitamin aisle at Walgreen's are for (that reminds me to Google why Cinnamon comes in a tablet form). I turned 39 and there is so much more to learn.
I find myself trying to figure out how to juggle the kids, homework, meetings at work, PT conferences, finding interesting things to cook, read books and articles and still be interesting and relevant. I hear my kids whispering behind my back..."Why does she dance like that?"  "Why is she wearing that?"  Recently, my 17 year old said to me..."Mom.  If you are coming to my school today, can you at least wear something cool?"  Since when did cable knit cardigans stop being cool?  I see the look in their eyes.  It's the same look I gave my parents when I thought they were uncool and old.  I have finally entered into the geriatrics aisle in the "aging" store and I don't like it.  I am almost fourty.  It should be a bumpy ride. I think I am ready.  I guess I better be.