Ovulation?

So according to glow I ovulated the week of 9/11. Came off birth control at end of July and had a period in August whih seemed to be regular (28 day cycle). I had ewcm a few days around Sept. 11th, 12th, 13th. Today I am experiencing more cm again. Not egg white but enough that it is leaving a mark on my panties. Anyone know why that might be?