Light pink/brown cm

My period is one day late and that would be a 30 day cycle, normally my cycles are 26-29 days max in the entire super long time I've been ttc.i was so hopeful, and purposely not testing, and then this am had light pink on toilet paper. I did a cervix check and there was ewcm like cm with brown mixed in, very watery. I drank a whole water bottle earlier so not sure a pregnancy test will work. But after seeing that I feel like af is coming even though I don't have any cramps or my usual pms headache. Any hope? Usually I just start my period heavy with bright red blood all at once. Can I have pink brown spotting and still get a bfp???