Is Implantation cramping a thing?

Hubs and I only had sex on the day we got a positive ovulation. Not before or after 😩. I’m already not feeling hopeful about this month because of that. Today is 7 days after having sex. I’m starting to get crampy. I’m sure it’s period cramps but a friend mentioned implantation cramping. Anyone else experience this around the same time? 🤞🏼