Horrible ovulation cramps?

Today I had terrible (what I assume would be) ovulation cramping. I'm in the middle of my cycle and I've never had cramping this early in my cycle. It was only located on one side but I could barely walk. I had intense pain for a few hours this morning, but now I feel achey. I've never had ovulation pain like this, but I looked through a few different TTC forums and it's more common than I thought. Luckly me and my boyfriend did the deed early this morning before the pain hit, so I'm hoping that it sticks.