I've noticed since about week 29 that bubs movements have been less. I went 4 days this week without even feeling a kick! I went to my doctor yesterday and he could feel movements by touching around, but I couldn't feel any, and he found the heartbeat straight away. My doctor has also said around 10 good kicks in 24 hours, and said if I'm at all worried, just go in and get bub checked out. At least if you do that then you get to hear bubs heartbeat and put your mind at ease.