The other girls are right. You could go up to another week or so with nothing before you feel him/her move again. At this stage you might also need to be very quiet to notice also such a lying down in bed as the kicks and movements wont get really stong just yet. The fact you have had some movements that you can feel already shows that bub is growing and strong. Its such a lovely feeling isn't it? It will come back soon and you will feel them getting stronger and more frequent as the weeks go by.
My first I was 19weeks when I first felt a movement and 15weeks with no2.