Implantation Cramps

Can someone tell me what implantation cramps feel like? I haven’t ever felt these before, but I’m having some cramps that seem more concentrated on the left side. I’m 7 DPO, and we BD’d the 2 days prior, the day of, and the day after. I’m definitely hopeful, but I am curious about what the feeling is supposed to be. In addition to that, I’ve been abnormally exhausted today, a little dizzy the past day and a half, and extremely emotional/cranky. Maybe I’m just getting sick, but the cramps have me confused. Help? TIA