Implantation Cramps?

Chantel • 🩺 RN💍Married 8.4.12 💙2 Sons- 4.21.13 and 5.15.20 💔MC 10.2016

Can someone explain implantation cramps to me pretty please? I’m 8 dpo, 9 dpt from Ovidrel and not sure if it’s the trigger shot or what’s going on. I get very quick, sharp twinges of pain lower abdomen. Nothing that makes me double over and it literally is like 2 seconds. Wasn’t sure if this could be that or maybe just caused from Ovidrel?