I had my last period on January 4-9, 2018. On my period calendar, I was supposed to ovulate between January 18-23. I had unprotected sex last January 25 but did withdrawal method. My boobs started to get sore yesterday, January 26 and also had minor cramps which I think about as my usual pms symptoms, but today, January 27 I had a weird discharge that only happened to me now, it was somewhat light brown in color and a little tacky. It bothers me because this was my first time having sex with a different person. Could you please enlighten me and what could my discharge mean? Thank you so much!