Decreased fetal movement

Hello po mga momshies, I'm currently 24 weeks pregnant, normal po ba na hindi ko maramdaman ang pag galaw ni baby? last prenatal check up ko po is at 21 weeks, okay naman heartbeat ni baby at 148. Nov 2 ko siya last naramdaman na nag likot talaga. I'm getting worried po. Although ang CAS ko naka schedule naman this Tuesday. Anyone else experienced the same? first pregnancy ko rin po ito. ???