Too early for implantation cramps?


Based on tracking CM and ovulation pain today is 4 DPO. I started noticing some slight cramping that seems to be worse on my right side. I don’t know what it is because everything I’ve read says that implantation pain normally doesn’t start until 6 DPO. AF isn’t due for another 11 days so I know it’s not PMS cramps. Anyone experienced the same thing?