Help please

Ok I have a 28 day cycle my last period was July 24 but it wasn’t enough to fill up a pad the 25 it stopped then started back up again the 26 and the 27 still wasn’t heavy at all barley notice it. The 28 me and my bf baby danced all day. Fast forward to the 29 I notice pinkish spotting when I whipped not for long . I have never spotted after a period I’m so confused please help. Also is this postive