yeap normal. i felt only flutters and like gas when i was 18weeks. at times, nothing at all. my 1st real movement was only when i was 21weeks. from then onwards, you feel the baby movement often. then it will decrease when you are in your late 3rd trimester. mine started to decrease at around 34weeks. was told that as baby grows, theres lesser space in the womb for it to be as active as before.