maybe you monitor some more? any bleeding/discomfort?
baby kicks will be more intense after 25weeks onwards. my baby was smaller in size compared to average. therefore i can only feel her kicks maybe 2weeks later than the usual coz she's small. n eventually, when I deliver her, alil premature, @36weeks, she weighs only 2kg. but things are fine now even thou she's still underweight.
Rest more, drink more water.. eat well. + you can try listening to music and see if baby have more movement?