I've had them before. . And it happens after AF.. doesn't happen often but it's definetly uncomfertable..what youre describing could be Round ligament pain. Round ligaments are the pair of ligaments that attach to the uterus around the area of the fallopian tubes. They extend outward to the pelvic wall through the groin area eventually fusing with the labia majora. These ligaments pull the uterus downward and forward providing support to the uterus. Round ligament pain is usually experienced as sharp or shooting pains on either side of the lower abdominal area. The pain can radiate to the groin area. Almost every Pregnant woman experiences these. But non-pregnant women can too. Look up round ligament pain or google it. Read up about it and see if this is possibly what you are experiencing! Hope this helps!!