It would be lovely to separate the woman's right to choose whether she has a baby (regardless of the circumstances) from the fact that abortion is ending a life in some way. Some might believe that life is less valuable, on balance, than the harm that might be done to other lives (the pregnant woman, other children, even its own potential for future misery) if it persisted.
But I can honestly see both sides. The pro-lifers are valuing the foetus' life and putting the woman (or family's) well being second, however you define that. They also have a real point that some women suffer emotionally in the longer term from having a termination. The pro-choicers are valuing the woman (or family's) well being and saying it's more important that children are loved, well provided for, and have sane emotionally stable parents who want them, and are saying in effect that if a child wouldn't have this it is better not being born, and a woman who does not want to be pregnant has more rights to her own body than the other person who is sharing that body, because the other person is somehow less of a person being very immature and having (at the early stages at least) less capacity for self awareness, feeling pain or self determination.
I do think the missing bit of the debate is exactly what the OP stated - the women who had a termination who are not guilt ridden and emotionally scarred for life. So well done for bringing it up.
The idealist in me would prefer a world where anyone who had sex took the responsibility that the act might produce a pregnancy, and was responsible in terms of choosing when to have sex and with whom given that knowledge. I think this is effectively the "religious" perspective - the idea that we should take our responsibilities seriously as well as our rights. It's an idea I subscribe to in theory. Unfortunately, given human nature it's really impractical.
so no, I dont think YABU to be guilt free. But equally, noone is advocating a woman should be lax about contraception and use abortion as their primary birth control method. So I think anyone facing the question of whether to have an abortion has already got into a difficult situation where there is no answer that is 100% satisfactory.
Hmm, this thread has really made me think though, so thank you all for opening my eyes to more points of view.