It is six days before aunt flow is supposed to come, and I usually start having pms symptoms about now but I've got nothing, no sore nipples, no cravings, nothing and I took my BBT this morning and the last few days it's been kinda high like 97.90 and 97.89 and today it was 98.07..according to my calendar if I am pregnant today is implantation day so I didn't know if your BBT goes up when implantation occurs or not?