How does your lower stomach feel in early pregnancy? i keep burping. Darkening of Areola- Yeah, this is a little weird, but it happens when women get prego. While it's not impossible that cramping at 4 DPO is a result of pregnancy, it's also not very likely. Other early symptoms include: bloating, spotting, mild cramping, breast tenderness, and. PID is usually a complication of an STI like chlamydia or gonorrhea. If you have this disease, you may feel pain in your lower abdomen, pelvis, and lower back. Other symptoms include heavy vaginal discharge with a foul odor, abnormal uterine bleeding, pain or bleeding during intercourse, nausea, vomiting, fever, or painful or difficult urination.