Your experience?

Ok, so according to Glow, my period is due Wed. So I've been having some cramps off and on the past few days. Lots of watery CM. Negative tests, the past 2 days. So today and it may be tmi, but after going to the bathroom (BM) I wiped and there was pink on the tissue. Went to the bathroom a couple hours later and it was gone. My first instinct is that it's af coming early since my original AF date is tomorrow and I'm like 95% sure I'm getting my period. But, I just want to see how many of you had pink spotting the day before your period and still got a BFP.