Bfp, then bfns, then pink tinged creamy cm?

So on Thursday I had a bfp, a pretty clear one, and then yesterday and today all I had were BFNs. 2 days before my bfp I had pink/brown spotting which happened about 3 days after my supposed very light period had ended. I've never spotted before. Now, I'm having very pale pink/yellow creamy/sticky cm but no cramps. I've also never had that kind of cm. What the hell is going on?!