Post partum

I had my son 5 1/2 months ago. No period still and EBF. I've been having EWCM the past 3 months for a few days a month. How can I ovulate If I havent had a period. I'm having it again and my boobs have been sore + I've had unprotected sex multiple times from dec 20th to Jan 15th or so. Does this mean I'm ovulating or just post partum stuff?

pregnancy test and ovulation test negative!