I have a bicornuate uterus and have had 4 children all delivered by c-section ranging in age from 19 to 4. I have had 28 day cycles with spotting in between for years now. Recently started a full 8 days early and bled for 13 days. Consistent lower back pain....all the time. OB did a standard pap 3 months ago with no problems getting to the right or left side. Did a biopsy yesterday and could not get tissue sample from the left uterus for whatever reason. Did a sonogram today and could not see my left ovary. Could this be fibroid? Scar tissue? What would cause the inaccessibility to the left uterus in such a short time period?