nervous movements stopped

So I'm 21+2, first pregnancy with an anterior placenta. over the past few weeks I've had the occasional pop or feel like baby is rolling, and pops got stronger and more of them a few days ago.. but nothing really since. It worries me a lot, although I read movements arent regular until 28 weeks.. and later with anterior placenta... I just want her to kick so I know shes okay...

Anyone have similar experiences to calm my nerves?