I had a similar surgery two years ago. My adhesion was so bad, that it covered the exit of the urethra. and forced the urine to tunnel under it and excit out of my vagina. This in turn, caused constant vagina inflammation and pain. The surgery (at the Mayo Clinic) corrected this condition.
I have to apply vaginal estrogen cream two to three times a week into the vaginal entrance and into the bottom of the vulva up to the clitoris. The modern vaginal estrogen creams use bio-identical, micronized estrogen in a very low concentration. I don't think it would be a breast cancer risk, at least I have not come across any warnings.
My vulva/vagina feels healthy now, and I do not experience any negative side effects.