Brown and pink bleeding on expected period

Hey guys, i am new in the journey of ttc, need your opinions. My period suppose to me start today. I have a regular cycle 28 days and never get my periods late. I have no underlying problem as well. Since december 2020 we are ttc, its been only lilke few months of trying. Rather than getting my period since morning its just like 1 spot brown discharge in the morning. In the evening just came from tbe toilet and wipe itt off with tissue its pink discharge coming from inside. I done the pregnancy it was negative, or might b it was too early to check as i am 9 dpo today. Can anyone please help me if ifs possible. Would appreciate it.