Opinions or insights needed.

I feel like I may have had a dip on day 18, then the next day on day 19 I saw the smallest amount of pink tinge after I urinated then wiped. But then I realized i did not have any of my normal pre period symptoms I always get severe nipple tenderness and cramps around the day leading to my period. This time nothing and it seems to early. This is the first time I have tracked my period so I am not sure of the exact details but I am pretty sure it’s a 30 day cycle with 5 to 7 days period.