Help!

Shiree

Hey everyone I’m so confused and need help. So I am 13 days dpo and AF was due today. I have had pink and brown spotting since yesterday. I have done a million test and keep getting BFN with the test off of amazon. I have some light cramping but it goes away and comes back and at one point thought for sure AF was arriving but when I checked nothing but brown and pink and the light pink is mixed with cervical musics. Could I be pregnant or is my body just being a pain. I am going to test again tomorrow morning with a FRT.

Thank u!