Low placenta & inconsistent movement

Brielle

Hi! So I had my anatomy scan 4 days ago and baby looks great! However my placenta is lying pretty low (not yet touching the cervix thankfully). I’m realizing a lot of inconsistency with my babies kicks. At 19-20 weeks I swear he was jumping around and now they’re super faint and minimal. Sometimes I go a whole day without noticing it. Is this normal? I hate not feeling him in there!