Let yourself go! Sled down the hill with your kiddo, learn to belly dance or have a belly laugh. You can make the most of this day by resisting the urge to control everything and to just let loose and enjoy yourself for a while.
This is not a good time for you to ask for special treatment -- though that day is coming soon. Things just aren't quite lined up in your favor, so try to take care of your own needs first.
You'll need to approach this day with a broad sense of humor. Find laughs even in the things that go wrong, and you'll save yourself years of expensive therapy. So let loose with peals of laughter when you're delivered the hot roast beef sandwich rather than the hummus and avocado sub you ordered. Consider it par for the course and savor the irony of it all.
Nothing is impossible when you put your mind to it now -- it's a great time to confront your style and fitness challenges. Try Bikram yoga; conquer the art of henna tattooing; and see if you can give yourself a bikini wax.