Pregnant or not pregnant

ofe

My ovulation date was sep 27 which I used glow tracker but I started feeling cramps, headache and nipple pains 2days after my ovulation. I have a 31 day’s cycle it not up to 2weeks I finished my period why cramps??? Though the cramps stopped after 2 days now am feeling pain in one side of my tummy but still having pain on my nipple. Please any ideas