The trouble is, things are only legal or illegal because as a group of people, a society, we decide whether to allow it or not. So theft is only illegal because we have decided it should be. Abortion is still illegal unless there is a lifethreatening problem for the baby or the mother (categories A and B) or if there would be a significant detriment (but not lifthreatening) to the health including mental health of the mother. This is the category C abortion. Over 99% of category C abortions are due to a threat to the mental health of the mother - there is no legal elective abortion in the UK just because you feel like it, you hace to convince two doctors that your mental health would seriously suffer if you didn't have a termination.
A lot of the recent press news is surrounding the question of whether mental health is, on balance, best presereved by offering a termination or by witholding one - i.e. yes it is traumatic for a woman to bear an unwanted child, and to raise or give away that child, but it is also traumatic for many (but not all) women to cope with the emotional aftermath of the termination. If the second is worst than the first then most category C abortions are technically illegal, because they would be detrimental to the woman's mental health.
Which brings me back to the OP - the point made, if I get you correctly, is that a lot of the post-abortion trauma is actually just society's expectation that you ought to suffer and feel guilty, i.e. is unnecessary, preventable trauma if we all agreed this was an ordinary acceptable thing to do. Noone should tell you that you "ought to feel guilty". On the other hand, many women do genuinely feel remorse, grief, are affected by "what ifs", have fertility impaired by the procedure etc. And noone should tell you that you "ought to get over it and move on".
A really interesting dilemma - if (and its a big if) it could be proved that on average the mental health of the pregnant woman suffers more from having an abortion than from carrying the baby to term, should we allow these abortions at all? Is it parochial to attempt to "protect" women in this way? Should we follow the informed consent route? Should counselling be mandatory and separate from the organisations which profit from providing an abortion service, and are therefore bound to be pro-choice in stance? Are they bound to be pro-choice in stance?
Minefield!