is it just me

This is my first child & ive always heard that walking & sex while you're pregnant helps make labor & delivery easier but I'm so freaking scared to have sex. They say it doesn't effect the baby but I'm just so scared. My baby is super low, like in my underwear. I'm 19 weeks. I want the easiest labor & delivery possible but I'm so scared to have sex. Am I the only women like this?