well i am afraid of being excommunicated, or am i already? this was at least 4 years ago and i have been to confession numerous times since then, and recivved the holy eucharist almost weekly for 3 months now, it came up to my mind just the other day, and in another post was told to confession sins that were forgotten, although i dont know ifi t was a mortal sin because i did not willfully consent to go against god, i was ignoratn in this area back then
Through personal effort effort lack of knowledge or understanding may be overcome. So we may be culpable due to not making a reasonable effort to know. But there is also invincible (unintentional) ignorance where despite trying we are unable to know.
CCC #1860
Unintentional ignorance can diminish or even remove the imputability of a grave offense.
But no one is deemed to be ignorant of the principles of the moral law, which are written in the conscience of every man.
The promptings of feelings and passions can also diminish the voluntary and free character of the offense, as can external pressures or pathological disorders. Sin committed through malice, by deliberate choice of evil, is the gravest.
Please read this, to be excommunicated one has to know that abortion is an ex-communicable offense:
ewtn.com/expert/answers/abortio2.htm
Latin Church Canon Law (CIC)
Can. 1323 The following are not subject to a penalty when they have violated a law or precept:
1/ a person who has not yet completed the sixteenth year of age;
2/ a person who without negligence was ignorant that he or she violated a law or precept; inadvertence and error are equivalent to ignorance;
3/ a person who acted due to physical force or a chance occurrence which the person could not foresee or, if foreseen, avoid;
4/ a person who acted coerced by grave fear, even if only relatively grave, or due to necessity or grave inconvenience unless the act is intrinsically evil or tends to the harm of souls;
5/ a person who acted with due moderation against an unjust aggressor for the sake of legitimate self defense or defense of another;
6/ a person who lacked the use of reason, without prejudice to the prescripts of cann. ⇒ 1324, §1, n. 2 and ⇒ 1325;
7/ a person who without negligence thought that one of the circumstances mentioned in nn. 4 or 5 was present.