Cramps CD13?

Jemma
I have PCOS and this is my first cycle on Metformin 500g daily, I'm CD 13 and am having quite bad cramps (not as bad as a period pain, kind of like a stabbing pain) on and off all day, it was mostly on my left side but now it's on my right too. It's different to the regular pain I get because of my PCOS which is mainly focused on my back though.
Could this be that I'm ovulating? Has anyone else experienced this?