Pro-Life/Pro-Choice polls are utterly meaningless.
If you identified "pro-life" as favoring the position that no abortion be allowed, you might get 20% of all people who would identify themselves as such. Identify "pro-choice" as having no limits on abortion at all, and again, you might get 20% of the people to agree with that position. In between, there are a million miles of gray. If I favored only first trimester abortions, would I be pro-life or pro-choice?
Most fundamentalists would consider you pro-choice, because supporting any abortion is supported murder in their opinion. I know, I spent 11 years in a private christian school amongst the vermin.