implantation cramping??

Megan
Has anyone experienced implantation cramping? If so, what did it feel like for you and how soon before missed period?
This morning I woke up and had a moderate cramping in my very lower abdomen. More like a pinching and pulling. It was painful but more annoying than anything so I took an aleve. My last period was the 7th and I ovulated on the 21st so that would make today my best chance for implantation. The pain went away but I still feel like there's something there. A little pressure maybe.