Hi everyone just need some opinions if anyone else has experienced this!!!

My period is normally irregular as you can see from the chart below but last month I had light pink/brown discharge which started on day 27 and then turned into just light brown bleeding for about 6 days...... and now again this month but on CD 26 !!!

Took a pregnancy test last month and was negative and not taken another since. Also I have zero period symptoms and no cramp last or this month !!!