horror stories (rant)

while being on this app I've heard horror stories about placenta abruption / still born/ miscarriages. I know I shouldn't worry and I'm a young mom. and I heard my little ones heart beat today, the chance of it happening is low. but I can't help but worry, as I'm moving In to the second trimester of pregnancy already. I'm worried about all the things that can go wrong. I pray every night that this won't happen to me. I can't take the thought of losing my baby. any advice or thoughts on how to ease my worries or is anyone else worried about complications ? anything would be helpful, thanks ladies.