Ok, ANOTHER question...this time strange!?

alrighty, here it goes, and i apologize about asking so many questions....i have been having mild period like cramps the past 3 days...it started after ovulation, so i was wondering since we had after we got a positive OPK test, is that a sign of pregnancy or is it my mind playing tricks on me, also my seem to be tender (although i have mild fibrocystic disease)