decrease in fetal movement?

Ladies what do you consider too little fetal movement? Any thing that's just not usual for baby? Im 26 +5 and baby girl is usually super active all day and night. The last couple of days though she has had maybe an hour out of each day that she will be active, and then she is still for almost all of the rest of the day and night. Is this normal as baby gets bigger? Are any other mamas experiencing this? I have a regular OB check up in 2 days, but should i call anyways? I did do a kick count a few hours ago, and did get 10 kicks within the two hour window, but i still wonder if i should be concered based on her usual hyperness that's lacking.