3 Times Negative but still delayed for 11 days

Hi asking lang, delayed n ako for 11 days, may cycles dati 34 days but recently month of oct and nov nag 28 days cycle ako, then last period ko Nov 3 to 7, now I'm 11 days delayed if 28 days cycle and for 34 days 4 days delayed n. Nag try ko ng dec 1 negative pt, dec 6 blood pt negative din and this morning 3 pt negative ulit. But I have discharge browish saglit lang then nwala nmn. I was confuse kasi first time n nangyari sa akin ito. I hope may makasagot thank you