I think the timing is bad since it's brand new, but you can't stress over it too much. I'm as obsessed as the next bag lover, but in the end of the day, it's just a bag. One water spot won't take away from the beauty of it. You'll make yourself crazy trying to protect it from the inevitable.
If you do send it away, please know that it will take several weeks to months. I waited two months for a zipper repair on a teeny tiny pochette!