I'm 18 weeks and I feel movements a lot. This is my third pregnancy.
It depends on how big your belly is, women that start on the skinny side can tend to feel it sooner, It also depends on the baby (some or just more active) and were your placenta is.
19 Weeks in 2 days and I feel lots of movement this is my 2nd baby and they say its easier to feel movement sooner after your first pregnancy
I'm 17 weeks and have felt the odd sort of flutter/tapping from the inside since 16 weeks, I have ulcerative colitis though so am probably more focused/aware of feelings down there, people have said to me it's probably just gas but i know the difference lol I'm sure you'll feel something soon :) I've found its more towards the end of the day when I'm sat down, relaxed and have my feet up a bit
Im 18 weeks also going on 19 weeks and I havent felt any movemnts either, but I just came from an appointment and the baby is fine. We are all different I think u have nothing to be nervous about :)