BABY KICKING

Hi i 24weeks 2day pregnent. I feel bubble blowing inside stomach, ie baby kicking. Kick during morning, afternoon, midnight. But past 2days baby kicking was very mild.. Not kicking early morning, brunch time, sometimes midnights.. Dont know why.. Baby kicking time vary or someother. I m very scared. What should i do. But afternoon, evening is okay.. Kicking is little reduced compare to day before yesterday. Yesterday n today i felt.