This is really the only argument you're actually making here:
Think of everything you accomplished in life. See how amazing it is. Those same things could never happen because of these murders of babies.
Two easy rebuttals to this argument come to mind.
First rebuttal: It's amazing to us because we're actually conscious and have the mental capacity to recall the important moments in our lives and ruminate on them. That you see abortion as a tragic loss is only possible because you have these abilities, and that gives you a baseline to which you can compare and make judgments. An embryo or fetus doesn't have this! It has no consciousness, no experiences, and therefore no baseline to judge the end of its existence against, let alone the ability to feel and compare and judge. This is like lamenting that someone born deaf will never get to experience music, or someone born blind will never get to gaze upon paintings or sculptures or other beautiful works of art. Yeah, that would be horrible for us because we've already experienced those things and derived pleasure from those experiences. But to the congenitally deaf or blind person in question, it's no loss to them because they've never had those experiences. In summary, this argument doesn't apply because you can't lament the loss of something you've never had.
Second rebuttal: I can very easily turn this argument on its head and use it against you, like this:
"Think of all the misery and pain and anguish you suffered in life! Think of how lonely and neglected you were growing up, because you had no father and your mother couldn't ever see you because she was away at work 16 hours a day so she could make enough money just to be able to feed you. Or think of how hungry and starving you were growing up because your mother didn't have the means to pay for both rent AND food for the both of you. See how horrible it is! Those same things could never happen because you were aborted."
Doesn't abortion sound wonderful now? At the absolute best, these two scenarios are equally likely and therefore cancel each other out. Since a wonderful life and a miserable life are equally likely, obsessing over all these hypothetical scenarios and "what if"s is pointless because nothing's certain, and you're left with no argument for criminalizing abortion. (And since the law basically works in such a way that any given activity is legal by default until a law is passed that criminalizes it, abortion remains legal and therefore a perfectly valid option for women.) At worst, the scenario I described is all but certain (or at least a lot more probable than the scenario you describe) because the mother has no family, no social support and no education, and is only qualified for minimum-wage jobs (and the economy's in the shitter so there may not even be any minimum-wage jobs available), in which case this becomes a solid argument in favour of keeping abortions legal.
In summary: You lose! Go home and think about your failings, then try again if you come up with a better argument.