Pray for two heartbeats!!

Well, here we go again...we are expecting again!! Only this time, there are two little beans in there instead of just one! That's right, we're having twins! We found out I was pregnant on May 30. I had my first OB appt and ultrasound this past Thursday, 6/14, and that's when the doc found twins...but we could only see one heartbeat so far. However, I am still very early, not even 7 weeks yet, so the doc thinks it may have just been too early to see the second one. He is referring me to the perinatologist (high risk OB) for another u/s in the next few weeks, so we will know more then. In the meantime, we are praying the second little bean starts growing and that we have two strong heartbeats at the next u/s. I guess there is a pretty high rate of pregnancies that start out with two and end up with only one, but at the same time, I have also heard from many women who saw only one heartbeat, or even no heartbeat, at their 6 week ultrasound, only to have two strong heartbeats 2-3 weeks later, so I am not giving up hope! Let the thrill ride begin!!