Implantation cramps or post IUI cramps?

Hi ladies,

I need some advice/input: I had my first <a href="">IUI</a> done on Friday (5 days ago), and was told I had 4 mature follicles. On Saturday and Sunday I had some cramping after the procedure. Today, I’m experiencing cramping again, mainly focused on the left side. Can this be implantation cramping? I don’t normally get cramps this soon before AF (due in 8 days). Any ideas?