Baby movement

28 weeks and since yesterday baby is not as active as the other days she usually is really active and starts moving ones i eat or drink something this time i have no luck I've been trying since 1pm its now 2:47pm and I've only got two small movements I've tried cold soda, juice and not much of her moving She will move if i press my belly but not all the time I'm trying to see if she moves without me pressing around would this be something for concern