Baby laying low Should I be concerned? Please anyone??

I'm 17 weeks pregnant almost 18 weeks and my friends sister in law and I had a conversation where I was like "oh no I can't feel baby move yet his really below my belly because I know his very small!! And she goes "well that's not normal because you could go into early labour,you should try to move the baby" I'm like wtf?? If the doctor wasn't concerned why should I be like? I hate when another pregnant person(carrying 2nd or 3rd baby) suddenly knows everything😪