Ohkay, well to start off I'm 17 years old and this is my first pregnancy. I'm so scared! I'm 18 weeks on thursday...what are the chances of something happening to my baby or if there was something wrong with me...I would know already right? i've been reading all these things about people and how they lose their baby cuz theres somehting wrong with their uterus or cervix or something wouldn't I already know that i've had absolutely no complications and the doctor says the baby is very very healthy I've been on prenatal vitamins since 5 weeks..Am I just worried about nothing? and how early can a baby be and still live??