Tammy, it sounds like your zucchini aren't getting pollinated. the female flower has a small "baby" zucchini behind it. If it doesn't get pollinated properly, it may grow a little bit, then turn yellow, get soft and eventually fall off and rot. When a female flower gets pollinated, it will grow rather rapidly into a zucchini. Be patient, this will correct itself as the summer goes on and you get more male flowers. If you think you might have a lack of pollinators, (bees, etc) you can try hand pollinating. Good luck!