Hello, I have had regular menstral cycle for over two years now. I ve recently had sex, may 22, I was expecting my period on the 24, instead of a period of red, I got a brown period. It only lasted for 3 days, not a lot of blood.. Not my regular period. Everytime I pee, I have white skin like structure. I didn t think I could be pregnant because I was so close to my period?? I took a pregnancy test, and it came up negative. I don t know what could be going on???