Less movement at 28 weeks should I be worried?

Hi guys.. I'm having less movement with my baby and I'm worried.. I feel her sometimes but it's not strong.. The day before she was moving like crazy.. Is she just resting? Did you get this when some days they just  don't  move much?? Please help.. I really want to go and get checked out but I'm afraid of wasting time and also I'm a worrier 24/7.. 😩