I concede that there may have been an agency, even several, that rebuffed this girl. But even if she had to travel a couple of hundred miles to find another agency, a black church, or a black family, she would have done that if she had wanted to have the baby and do the right thing. Plus, there are good people (black and white) you can turn to even in neighborhoods that seem unfriendly to minorities. For example, are we supposed to believe that if she'd gone to priest at a Catholic church -- or a minister at a Lutheran church, etc, -- she would have been turned away? I don't buy her story.
I mostly agree with you, although I think you overestimate the amount of resources the average college student has available to him or her. I am not sure I completely believe her story either- many of these abortion stories tend to be self-serving, assigning blame for the abortion on everyone else but the woman herself. It is likely what she said happened, but it is also likely that she feared that if she had the baby, people would find out a) she got pregnant out of wedlock and b) she had sex with a black guy.