A little nervous

Not sure if I'm feeling 3rd child syndrome or what, but I will be holding my breath till I start to feel movements around 18 weeks. A friend of mine just had a miscarriage in her 11th week and I have had another 2 or 3 friends who have experienced miscarriages in the past year so I guess it kinda brings it home that it does happen sometimes. The best I can do is pray for this baby, trust in God, take my vitamins and try to stay as healthy and relaxed as possible.