I was 14 weeks 5 days with my first which I think is really early for a first time mom, but I was soo thin.
I can't really remember with 2 and 3, but I think my third it actually took longer for me to feel what I was sure were kicks.. 18 weeks and 21 weeks was when they were really consistent. It may have been the position of her placenta. She is also just a very chill. laid back kid so it could be that too.
This one I felt what I knew for sure were flutters toward the end of 13 weeks when I was laying down, and 17 weeks I felt kicks. I am 18 weeks today and can most def feel little one moving around in there as we speak. I also have already started getting braxton hicks... yayyy me.