If the cramps feel diff this month may b its like implantation. I always felt itchy cramping or pinching like cramps on three cycles of clomid donno what it was. I did not conceive in any of those cycles thou.
Its funny that you posted this.... I am on my 3rd cycle of IUI, mine was done 3/8. With my first 2 I only felt cramping/discomfort when I ovulated, but I have felt a bit achey ever since Monday. I am not exactly sure why it is different this month, but I am hoping its a good thing! Best of Luck to you!