Im 9dpo and today been having bad tummy cramps and bad lower back pain. Had a sharp stabbin pain on left side of my lower tummy today which made me stand still and tale a deep breath. Since 5dpo bin having cramps on and off with fatigue sore nipples. Nipples not sore anymore just the cramps and back pain and wonderd if this could b a sign of implantation. My af is not due till fri so 5 days away and neva get af symptoms till the day b4 af is due. Advice please