4-7dpo been cramping at lot, felt like a period was coming on. 8-9dpo been having sore breast. Took like 4 pregnancy test what I thought where faint lines was just evap or negative! Could I have had implantation cramps from 4-7dpo? And having more headaches more frequently than usual. I've never had pms or sore breast before a period? Just curious if anybody else had this and did you get end up with a BFP?