Hi good morning, i had a miscarriage it was ectopic , my left vagina bone hurts in front , why is that?

Pubic symphysis?: I am going to presume that your "vagina bone" is the prominent bone at the front of the pelvis, the pubic symphysis. Even though you did not have a vaginal pregnancy, normal pregnancy hormones were likely present. These hormones may relax the ligaments of the pelvis in preparation for childbirth. With relaxation, the pelvic ligaments/muscles are more prone to strain. I believe this is the cause.