help!!

Cycle day 27 of normal 32 day cycle : randomly lots of creamy white cm 
Cycle day 28 af comes early . Brownish Sticky at first (sorry tmi) then lower abdominal pain for the rest of the night . 
Af day 2 wake up around 5am with full on AF flow 
After 2pm flow very light now 
No cramps at all today 
Then I poisoned my mind googling and finding a couple threads about women who have had BFP even after what they thought was af . 
What do you guys think ?