I am supposed to have AF on the 18th so in 7 days. It does vary sometimes so it could be in 5-7 days. I thought I was about to have AF in a day or two because I have had a pinkish brown CM when I wiped earlier and my breasts have been tender and also I’ve been having cramps. I did check my app and realized it’s not for 5-7days. I am seeing the CM the light brown or pinkish brown every time I wipe now. I don’t know if this is implantation or just my period coming? Any thoughts?