Late period lotion like discharge

B

My period is 6 days late I’ve had irregular periods but for the past month they have been very regular I took a test before my missed period and one two days late still negative . on the second day of my missed period I had some brown discharge then it went to pink. nothing on my underwear but only when i wipe that repeated for two more days now I see nothing no discharge no period just a lotion like CM what can be going on if it’s not pregnancy