Baby movements 33w 5days

I do kick count every day after breakfast lunch and dinner and get a minimum of 30 counts within 30 minutes.. but during the other time of the day baby is active somedays and baby is little less active other days.. today baby did pass the kick counts as usual 30 within 30 minutes but he is little sluggish i feel .. is this a concern.

He has been so unpredictable always also i have anterior placenta. Is it normal at this point for baby to be little less active some days ?