pink spotting days after period?

Harleigh

I have a normal cycle 7 days and this month it ended on December 10th. and today is the 13th. i just randomly went to the bathroom and when I was done peeing there was light pink on the tp after started having mild cramps but not hard one like period ones. but I shouldn't be. i been kinda moody and really in the mood to have sex the past few days. me and my bf are trying for a baby... Im just wondering if anyone's had this problem before?