I have been having some cramping off and on today. Every month, about a week before AF comes, I have cramping. I hope this isn't a bad sign. Can you have cramping after implantation that is a symptom of pregnancy? The nurse told us that the embryos would implant within 24-48 hours of the transfer, so this is too late for implantation cramping. I am trying to not freak out. I am.