Braxton Hicks

So I’ll be 15 weeks on Friday.. this is my third pregnancy.. with my first pregnancy I started feeling Braxton hicks around 16 weeks, with my second pregnancy (2 years after my first) I started feeling them around 12-14 weeks.. now I’m pregnant with my third, I’ll be 15 weeks on Friday, it’s been 5 years since I’ve had my second born and I’m not really feeling Braxton hicks yet… is this normal?? Just makes me nervous that I’m not really getting Braxton hicks because will this mean my uterus won’t contract correctly during childbirth?? I have health anxiety and worry about postpartum hemorrhage.