Chances of having another missed miscarriage?

This last october(10/16/10) I had a pregnancy that ended in missed miscarriage at 16 weeks. The doctor said the baby had probably passed away a week earlier. It started with a bloating feeling the whole way around mt waiste that was so strong it hurt. This pain lasted for three days. After three days my water finally broke. I did not actually deliver the baby until about three days after my water had broken. I did need a D&C afterwards. Keep in mind the whole time I was bloated I never knew it was something to worry about. So now I an currently a little over 17 weeks pregnant. I did have a scan about a week ago and the baby looked finrle although I was concerned that the heartbeat had dropped from 158 to 133 in the matter of a week. So now all I worry about is another missed miscarriage. I was also on progesterone suppositories untl 16 weeks. So all I'm looking for is some stories of wmen witj similar experiences. How did it end? Good or bad. And any friendly advice. Thank you and God Bless!