Haven't been able to do the kick counts today

So I was told by my maternal fetal specialist to do kick counts twice a day when baby is most likely to be active . I've been doing them everyday since I turned 28 weeks . Well I haven't been able to do them cuz the baby hasn't really been moving much today . Should I be worried ? I have a doctor's appointment tomorrow with my OBGYN in the morning . I've tried cold water ,food ,a cold soda ,and fruit and I DNT get a response like I normally would .