AF was supposed to be here October 30, but hasn't shown up and she's always on time. Cycle is usually 28-30 days?? Had our donor come over on October 18, during fertility time, and the week after that there was pink fluid on the toilet paper when I wiped, but it only happened once. Do you think it was implantation bleeding? I took three pregnancy tests and all were negative? Extreme nausea and lower back pain? Do you think there's a possibility of a baby on board?