sex during ovulation

Amanda
Ladies! So my husband and I are at the point not necessarily trying but also not preventing pregnancy. I'm usually pretty in tune with my body and when we had the sexy time during my ovulation period I was like "it's possible". But my period came in like a bat out of hell. No biggie. Until now. This months ovulation came and went with no funny business. But for the last few days I've been experiencing somewhat of a light cramping. Not sure how to explain it and my nipples are sensitive. To make a short question long.....what are the possibilities of getting pregnant and having a regular (and by regular I mean crippling pain and a massacre) period to follow? 
Thanks ladies!