Joseph d'Agostino gives a good rundown of Carenet.
Carenet is one of several national organizations that support crisis pregnancy centers (CPCs) around the country. CPCs increasingly are sponsoring post-abortion groups as part of their menu of services.
However, each CPC--and there are around 2500 of them in the United States--has its own board and way of doing things, so it is hard to make generalizations about the level of support a woman might find if she calls the CPC nearest her. It could have a dreadful group leader or a wonderful group leader. Caveat emptor.
I haven't listed CPCs on my "resources" section because of the variability, but since they have a spiffy new way of finding the CPC nearest you, I'm going to add that link and keep my fingers crossed. It's the Option Line.