Experiencing cramps on the left side at 6 days past ovulation (DPO) could potentially be a sign of early pregnancy, but it is not definitive. Cramping during early pregnancy can occur due to implantation, as the fertilized egg attaches to the uterine lining. However, it's important to note that cramping can also have other causes unrelated to pregnancy, such as gas or digestive issues. If you suspect you might be pregnant, it's best to take a home pregnancy test or consult with your healthcare provider for a more accurate assessment. They can evaluate your symptoms and provide further guidance based on your specific situation.