It also depends a lot on the position of your placenta. If it is on top of your uterus rather than behind it then you wont feel your baby much until they get bigger. This is my first pregnancy and i felt her at 16 wks but my placenta is behind my uterus so i can already see her movements from the outside. Just remember everyones body and pregnancy is different. Try not to worry.
Good luck at your appointment hun, I'm sure there's nothing to stress about. Maybe your baby is just a lazy baby! My aunt's second was a lazy baby, barely moved ever.
I am 23 weeks and my little boy always kick since the week 21 so dont worry : D
I'm 21 weeks as well and my son want stop moving lol
I go back this Thursday for an ultrasound so that will make me feel a lot better.
I feel my little girl move all the time. I actually started feeling her move around 17 weeks. Don't be too alarmed, most women who are pregnant with their first baby don't usually feel their baby kick until around 21 weeks. I'm sure you'll start feeling him soon. When was your last doctor visit?