I'm 25 yrs old and my feance' and I have been trying for about 6 months now. I have been having lower back pain last 4 days ago. After my last period was Aug. 13 through 17. The next day, my breast started hurting although it was mild it felt sore. It started first on my left breast. The sore starts on the middle of my areola then it goes around. it feels like a hart tissue in there. Now, my right breast feel the same way. My lower back in the other hand is now bothering me. It feels like the pain before getting my period just a little worst. I took the test 3 days ago and I was negative for pregnancy. I am confuse! Please help!