So a week ago, i took plan b 15-30 minutes after having sex i know he didnt pull out. Well i looked at Glow, and it said that it was the day After my ovulation, which means i was still fertile. Well today, a week later exact, im having cramps liks i want to start my period. Im not due to come on for another 6 days. Could this be implantation cramps? Could planb have failed since i was ovulating? Nervous wreck