Hi I'm 36,my tubes were tied 6 yrs ago. I just had two and a half days of clotting not on a pad only when using the bathroom. In four days I had only one lightly soiled pad. Now on my third and fourth days there's light pink blood when I wipe. My Dr. Office was closed for the holiday, so I will be calling them tomorrow. Could I be pregnant?. I also had sore breast for the past three weeks and lower back pain.