I get ovulation cramps, and a little spotting, mid-cycle. Never noticed them years ago but they're loud and clear now. Could be that you're just getting more bodily-aware as the carbs clear out?

Mine aren't near as bad as TOM cramps, but they do get my attention, and they do respond to ibuprophen.

Or Sex. Generally a little more (than normal!!) interested at mid-cycle! But be careful--it IS Mother Nature's way of doing her best to get you pregnant at the best possible time!