Pink cm 5 dpo

Hi everyone, so I'm just wondering how many of you have had this...
​June 3 was the last day of my menstrual 
​June 14 I have had intercourse 
​June 17 was my predicted ovulation date (according to my charts)
​June 22 (today) I had light pink cm  
​I'm 26 y/o and never had this...I'm not really ttc but wouldent be upset if it happened. 
​I'm currently not on any type of bc or using any other form of protection with my partner.