Ive never experienced this before, but today I had really intense cramps, not throbbing cramps like AF pain, but just constant pain in that area. I mentioned it to one of my friends at work today (she has MS and has been through everything under the sun poor thing) and she asked me if i was on the pill (which Im not, its my first regular cycle off it, and Im on CD 13) and she asked me my dates, and seeing as its smack bang in themiddle of my cycle, she said it might be my body ovulating.
I always thought ovulation was on one side or the other, this sort of felt centralised, maybe slightly to the left, but it was just really intense, for maybe 1.5-2 hours, but seeing as Ive never felt it before, im not sure??