AF was due the 3rd

Chas
Took a hpt in the 7th and then the 9th BFN but now it's the 10th twice over the last 2 days I've had very light pink spotting and once light brown spotting and today I'm crampy... Does the sound like implantation or AF is coming????? If implantation when would you re test ? For real comment and give me advice please !!