My boyfriend of 9 years had sex during my fertile window, we didn't use protection but he didn't came inside. My period was supposed to come on June 26 and I am rarely late. A day before I was supposed to get my period, I had a light prink to brownish discharge accompanied with some cramps. But the discharge went away the day after. Now, its already July 2 and still havent got my period yet but I have constant cramps and some mild lower back pain.