Watermelon

Out of the 4 watermelon-lets that is growing, only the first one is promising as it has been growing steadily every day.. now it is the half size of my palm!! The other 3 are not really growing so I think fat hope! yesterday morning, I spotted an opened female flower but as it was raining (and so the pollens are wet!), I wasn't sure if I hand pollinated it enough. By the time I get back to it in the late afternoon, the flower has closed off!!! Sigh... Hoping for a miracle perhaps?!