Confused

falak

Ttc frm 3yrs, took letroz diz cycle n ovulated on CD 16, today is CD 29, yesterday was 12dpo tested but bfn having cramps frm yesterday juz lyf af cramps, n today also having d same but lil bttr, spotted brownish cm with some blood tinge to it so can it b ib can ib b so late, today wn wiped found diz, is diz mucous plug forming or start of the period, found some brownish spotting yesterday but ntng today, period nt due till tmrw