Im told a one or two day period is caused by stress. Then I'm told its implantation. I had a normal AF 3/24-3/28. My two day AF was 4/21, starting light then brown 4/22 and on the 23rd I had a lil pink discharge when I wiped, after that nothing. I don't recall being stress at that time. If I were to be pregnant I'd be around 6wks 3day, but I'm still getting BFN. Can someone give me advice on this please?