Hi thanks for your question.
You had infection of uterus
following an abortion,most probably septic abortion
.Septic abortion do leads to formation of adhesions in uterus which makes the carrying of next pregnancy
difficult.S eptic abortion also leads to formation of what is called as tubo ovvarain mass (TOM) in which tubes,pelvic tissue and uterus makes a single mass making conception difficult.TOM can get resolved with treatment over a time period.Addesions in uterus can be released by hystroscopy.The mass your feeling lower down could be inflammed and hypertrophied cervix
,which can also resolve over a time period with treatment.
Hope this answers your question.