Not feeling 3rd baby yet

I have two boys already and I remember feeling my second one around 16 weeks. This time around I’m having a baby girl and I’ll be 18 weeks on Monday but still have not felt her move. I was supposed to go to OB checkup Tuesday but caught the flu and had to reschedule so I am kind of freaking out that I am not feel her moving yet. At my ultrasound at 12 weeks I did not have anterior placenta.

Anyone else?? Please help ease this anxiety 😩