Blueberry flower.

I (impulse) bought a blueberry months ago. I looked up the conditions it needs and you need two, a male and a female. I didn't know which one I had- basically it was a twig- so I had to buy two more one of each sex. I now have 3. They are flowering but I don't know if I will get blueberries.  I am hoping for some busy bees to do the polination.  Fingers crossed.