I felt the same thing with #2 at about 13 weeks, then again at around 15 weeks. At 17 weeks I started to feel real movement and then felt nothing again until 20-21 weeks and from then on...no rest...mine is not so much a kicker but rather a stretcher and mover.
With my first I noticed nothing till about 18 weeks and then punches and kicks right up until delivery.
Sounds all normal to me!!!