I had something similar happen to me this pregnancy. Little one all the sudden completely changed her movements and movement routine, and took a break from moving for about a day.
After a trip to L&D to monitor her for a bit, they assured me that she was fine, and she even started kicking the monitor while I was there!
The nurses & doctor assured me that it was typical behavior, and that baby's movements can decrease as they get larger. As long as in a session of kicking you can count at least 10 movements (of ANY sort, even small ones) within two hours, it should be fine. Drink something sugary and lay down on side to try to engage baby to move.
Ultimately though, if you are worried or the baby isn't moving that much, I would call your doctor or midwife. Better to be safe, and only YOU know what's normal for your baby.