Lack of movement..

Anybody feel a bit worried when bay suddenly stops being as active as they were before? I’m 25 weeks and 5 days & My baby is usually kicking up a storm but for the past few days his kicks have been super mild and spread out throughout the day, don’t get me wrong I still feel him but the movements aren’t as strong 😩 what should I do? I have an anterior placenta as well! Help!