Help please

MaKayla • 21• Married to my Middle school Sweetheart! • PCOS • due with #1 on 07/01/2020

I am 20 weeks and 1 day. I am just wondering I keep getting this little sharp pain in my uterus for a few seconds then it goes away?? It’s like babygirl is stabbing me or something.. what could this be ??