Still no movement at 24 weeks,

Destiny
I'm 24 weeks and this is my first pregnancy. I haven't felt any for sure movement at all yet. I've done the whole lay on your side and drink water thing, I've poked at my belly, I've changed positions, I've called my Dr, and the nurse told me that I shouldn't worry because every pregnancy is different. But I still do worry. Has anyone not felt baby this far yet..? I'm just so worried he's not okay.