Don't be so sad. I had the same experience during my first pregnancy, the heart beat stopped at week 8. I was shocked and upset. Afterall, I believe the baby should have some problems that he self-limited his life.
My second pregnancy was fine and gave birth to a healthy boy. Now, I am in my third pregnancy and is expecting the baby girl to arrive in 2 wks time. So, don't give up ah and must take care yourself very good to prepare the next one.