Stomach pain

Could possibly be pregnant. Could've conceived about a week ago so approximately 3 weeks. I've had light random cramping for the past two days. Nothing painful or serious. But today my stomach started feeling sore. Just below my ribs to the bottom of my stomach. Just wondering if it could be a symptom? Not super sore or sharp pains just a little sore like working out a little or maybe sleeping on your stomach all night.