Implantation cramping? Is there such a thing?

Kennedy • Married to my soulmate since 7.4.2020!💍💞 We have a 4 year old son, who took a year and a half to conceive! We are expecting baby girl March 11th 2021 after 2 1/2 years of ttc with fertility treatments 💖

Last night around 7:45ish I got this REALLY sharp cramp like I was being stabbed? It would happen then stop and come back like 4 seconds later? It lasted for about 5-10 mins. I was 8dpo yesterday is it possible that was implantation cramping? Has anyone ever experienced this? I don’t remember much from when I was pregnant with my first! Any help is appreciated as this is my first cycle using femara and I’m really hopeful!! ☺️☺️